EMBO/sd-character-level-ner huggingface dataset:
(A) Flow cytometry detection of cell surface binding of 4D9 (blue) and isotype (green) to wild type and Trem2-/- mouse bone marrow derived macrophages. Representative histograms are shown as MFI (mean fluorescent intensity). Graphs represent the median signal intensity ± SEM (n=3). Student's t-test (two-tailed); Trem2+/+: p = 0.0005; Trem2-/-: p = 0.4435; n.s., not significant.
U2OS cells treated with DMSO (control) or Chk1i were labeled with CldU and IdU for 10 and 30 min, respectively. Data come from 3 independent experiments and a total of 304 (DMSO) and 312 (Chk1i) fibers were scored.
(B) Immunohistochemical staining of control and Plcg1 conditional knockout (cKO) sagittal brain sections. The deletion of Plcg1 caused structural changes in SI and OT projections in the Plcg1f/f;Nes-Cre (d) mice compared to the controls (a) (n = 4; scale bar = 1 mm). The areas delineated by the white boxes (insets) are magnified images of the OT (b and e), and the yellow boxes are magnified images of the SI (c and f). (C) Quantification of the axon bundle distribution. Green boxes in (b) and (e) were selected as tegions of interest (ROIs) using the ZEN software (n = 4) (one-way ANOVA, F-value: 118.5745, P**<0.005).
e) DLD1 cells cultured in rich medium (Fed) were deprived of serum and amino acids (Starve) for the indicated times (hours, h) and levels of NCOA4, p62, LC3 and GAPDH were determined by western blotting.
Read distributions of RNAPII-FUS-tRIP (purple lines) and Chr-FUS-tRIP (black lines) around the APA sites repressed (bold lines) or activated (thin lines) by FUS. The p-values for the differences between RNAPII-FUS-tRIP and Chr-FUS-tRIP around FUS-repressed APA sites are indicated by circles. An arrowhead indicates a peak upstream to APA sites in RNAPII-FUS-tRIP.
A, B: Mithramycin displaces SMARCC1 and SMARCE1 SWI/SNF subunits from chromatin in a time-dependent manner in BT12 rhabdoid tumor (A) but not U20S osteosarcoma (B) cells. Western blot analysis showing whole cell lysate (Total), cytoplasmic soluble (CS), nuclear soluble (NS), and chromatin bound (Chr) fractions collected after exposure to solvent (S) or 100nM mithramycin for 8 or 18h and probed for the SWI/SNF subunits (BRD9, SMARCC1 or SMARCE1) or H3 (chromatin fraction control) and GAPDH (soluble fraction control).
(C) Co-immunostaining of VenusClC-3 (green) with EEA1 (red, left panel), Lamp-1 (red, middle panel) or synaptophysin (red, right panel) in either CA1 or CA3 region of Clcn3ven/ven mice. Arrows indicate structures of overlap (scale bar: 5 µm).
Experimental setup (uppe and muscle weight (bottom of M) in GA muscle from AAV-mGPDH-treated STZ-treated mice at da 14 (M) post CTX intramuscular injection
BMDMs of the indicated genotypes were infected with YFP-S. aureus (MOI 10) for 1 h. (B) Representative images of YFP+ BMDMs labelled with Magic Red cathepsin L substrate (red) and DAPI (nuclear stain) 1h post-infection. (C) Quantification of Magic Red cathepsin L staining from panel (A). Average fluorescence intensity of Magic Red cathepsin L substrate per cell relative to fluorescence intensity of YFP-S.aureus (n = 26-29 cells). (D) Quantification of Magic Red cathepsin L staining co-localised with YFP-S. aureus from panel (A) (n = 26-29 cells). Data information: One representative experiment out of three shown. Error bars represent SEM. P < 0.01, **** P < 0.0001. Student's unpaired t-test.
Detection of Pbs2 phosphorylation at S514 The yeast strains KT003 (pbs2Δ), KT005 (ste11Δ pbs2Δ), TM280 (ssk2/22Δ pbs2Δ) and KT043 (ste11Δ ssk2/22Δ pbs2Δ) were transformed with YCplac22I'-Pbs2-HA, and were treated with the indicated concentrations of NaCl for 5 min. Pbs2-HA was immunoprecipitated from cell extract, and phosphorylated Pbs2 was analyzed by (A) Phos-tag band-shift assay In (A), the positions of Pbs2-HA phosphorylated (S514-P) and unphosphorylated (S514-OH) at S514 are indicated.
(D) Representative H&E (Hematoxylin-eosin) staining pictures of colon tumors (The scale bars represent 1000 μm).
B Endogenous MOAP-1 resides at the p62 bodies upon proteasome inhibition. HCT116 cells were treated with MG132 (5 µM) for 8 hours and analyzed by IF with anti-MOAP-1 (in green) and anti-p62 (in red) antibodies. Data information: nuclei were counterstained with DAPI (blue)
f. Representative confocal photomicrographs showing the pattern of endogenous mitochondrial NIX in human ARPE-19 cells treated with DFP ±DGAT1i/2i. Samples were immunolabelled with primary antibodies to NIX (green) and ATPB (red). Scale bar = 2 μm. g. Representative confocal photomicrograpghs of Cathepsin-reactive endolysosomes in human ARPE-19 cells treated with with DFP ±DGAT1i/2i. Inset shows examples of lysosomal phenotypes. Scale bar = 5 μm. h. Colocalization quantitation for experiments shown in 6g. One-way ANOVA with Bonferroni's post hoc test. ****P<0.0001. Median represented by dashed line, quartiles by dotted lines n=2 biological replicates. i. Colocalization quantitation for ULK1/WIPI2 immunolabelling in human ARPE-19 cells treated with DFP ±DGAT1i/2i. Median represented by dashed line, quartiles by dotted lines n=2 biological replicates. j. Quantitation of lysosome positioning in DFP ±DGAT1i/2i. One-way ANOVA with Bonferroni's post hoc test. ****=P<0.0001. Median represented by dashed line, quartiles by dotted lines n=2 biological replicates.
Pearson correlation of mitochondrial ATP production rate (JATPox) and OPP incorporation of NIH-3T3 cells treated with TGFβ or mock for 2h, 4h, 8h, 24h and 48h, relative to mock-treated cells. Also see EV Figure 1k and l. Note that the datapoints of the 2h and 4h measurements overlap.
O. Quantitation of the BODIPY signal shown as Integrated total lipid for the genotypes mentioned above, n=10 for each. The box end points are the upper (75%) and lower (25%) quartiles, the whiskers define the maximum 95th percentile and minimum 5th percentile values respectively, the central band is the median, the square is the mean, and the diamond an outlier. Data were analysed using the Kruskal Wallis test followed by Dunn's test for post hoc analysis for significance due to unequal sample sizes. ***p<0.001, **p<0.01, *p<0.05.
(F-H) Immunoblot analysis (F), immunofluorescence images (G), and quantification of the percentage of cells with one CP110 dot (H, n = 3 independent experiments) for RPE1 cells transfected with control or ENKD1 siRNAs, cultured in serum-free medium for 120 h, and stained with antibodies against CP110 and acetylated α-tubulin and DAPI. To quantify the percentage of cells with one CP110 dot (C), >80 cells were analyzed for each experiment. Scale bar, 1 µm.
(B) Liver triglycerides and (C) plasma transaminase activity (ALT) measured in WT and p38γ/δ-/- mice after 3 weeks of MCD diet.
Single cell time series of Her6::Venus, mKeima-H2B and Her6::Venus signal normalized by mKeima-H2B corresponding to the cell in (c).
B. Effect of disrupting HSPH1 on stress sensitivity. KYSE150 and KYSE150HSPH1-/- cells were exposed to heat stress (45 oC) (means +/- SD, n = 3).
Nuclease assays with MR and various NBS1 fragments (50 nM) on oligonucleotide-based 5'-end labeled dsDNA. The reaction buffer contained 60 mM NaCl and reactions were incubated for 2 h.   Quantitation of experiments such as shown in (A). Averages shown; n ≥ 3, error bars, SEM.
A. Schematic representation of the experimental paradigm. Plasmid concentrations used: 0.5μg/μL pCS2-CD63-eGFP, pCS2-CD63-mRFP, pCS2-Rab7a-mRFP or pCS2-Lamp1-eGFP; 0.4μg/μL pCS2-Rab7a-eGFP or pCS2-Rab5a-mRFP; 0.3 μg/μL pCS2-Rab5a-eGFP; 50nM LysoTracker; 200ng/μL cy3-pre-miR-181a-1 or cy5-pre-miR-181a-1.
B. The additional band of Δ159-167 represents a third N-glycan sensitive to EndoH. Upon EndoH digestion, all bands converge into a non-glycoform band (lane 3 and 4). In Δ159-167(169) the third glycosylation site is not present anymore.
B) Dependence of expected log2(H/M) values at t=24h on the proteins half-life, given the factor (α) by which its catabolism is inhibited. Note that beyond α=10, the curves are nearly identical.
Western blot analyses of EV preparations. (C) EV preparation isolated by size-exclusion chromatography (SEC) from glutamine-depleted HCT116 cells and then separated by high-resolution iodixanol-PBS density centrifugation. Note that exosomes (exos) and microvesicles (MVs) are found in only partially overlapping fractions and the pattern of Rab11a separation mirrors that of exosome markers (primarily 1.064 - 1.085 g/ml).
B: STLC-synchronised mitotic FAM83DGFP/GFP knockin (KI), FAM83DGFP/GFP (F283A) (FA), and FAM83DGFP/GFP(F283A) stably expressing aGFP.16-CK1α (FA + aGFP.16-CK1α) U2OS cells were subjected to GFP TRAP immunoprecipitation (IP), followed by immunoblotting (IB) with the indicated antibodies. Asynchronous (AS) cells were used as controls. Data information: All blots are representative of at least 3 independent experiments.
L) Immunocytochemistry of macrophages differentiated in vitro from Csf-1rflx/wt;Cx3cr1-Cre- and Csf-1rflx/wt;Cx3cr1-Cre+ mouse bone marrow. Macrophages were stimulated with LPS and exposed to fluorescent opsonised latex beads for 1 hour before fixation and quantification of bead+ cells via microscopy. Cells were stained using MitoTracker (red) and DAPI (blue). Arrowheads (white) indicate bead+ cells. M) Quantification of mouse macrophage phagocytic activity expressed as percentage bead+ cells. (* p = 0.024, Student's t-test with Welch's correction, n = 4 assays, error bars indicate SEM).
F The chlorophyll concentration in leaves was analyzed. The percentage indicates the chlorophyll content relative to vector control before treatment. Four independent experiments were conducted. Values are given as mean ± SD, n=4. *p<0.05 by Student's t test.
C. Total RNA from the indicated cell lines was subjected to Northern blot analysis to determine the molecular size of lncRNA-MIF. Actin was also included as a positive control.
Time required for 50% of worms to die (TD50) on partial lawn and full lawn of P. aeruginosa. Individual data points indicate replicates with ~100 worms each. **** P ≤ 0.0001, ns (not significant) P > 0.05 as determined by two-tailed unpaired t-test. n ≥ 3 assays. Error bars indicate SEM.
A) Four-week-old seedlings were dipped into a suspension containing virulent Pst DC3000 and 72 h later the disease symptoms were scored. Data represents mean values ± SEM (n=20;***, p<0.001; paired t-test). Three biological experiments were done showing similar results.
D) Heatmap of the SASP genes for doxorubicin- or abemaciclib-treated groups (8 dpt) relative to vehicle-treated group from the RNA-sequencing datasets (p-value<0.01 was regarded as significant).
HeLa cells were transfected as in (A), and nascent RNAs were visualized by pulse labeling with ethynyl uridine (EU) for 30 min. Nuclei were counterstained with DAPI (DNA).
Results showing the effect of hcGAS, hcGAS△cGAMP, hcGAS△DNA or hcGAS△Oligo on NHEJ in HEK293 cells. Corresponding immunoblot inserts depict cGAS expression.
B) Frequency distribution of the divergence magnitude in the nests and LECs in the different growth phases. Nests are always shown in red and LECs in blue.
(C) Sb-Ccm1 interacts weakly with S. cerevisiae 15S rRNA. The level of Ccm1-bound 15S rRNA was measured using quantitative PCR analysis following mitochondrial RNA immunoprecipitation of S. cerevisiae cells expressing Sc-CCM1-13Myc or Sb-CCM1-13Myc. Data was normalized to the control group without the Myc tag to obtain the relative fold enrichment. Graph was plotted using data from three independent repeats for each strain and p value was calculated by unpaired, two-sided student t-test. Error bars indicate S.D. ***, p value < 0.001.
(A) Immunoprecipitation/mmunoblot of E3 ubiquitin ligases by PERK and the binding to mutant LRRK2. HEK293 cells were transfected with PERK and either MARCH5, MULAN or Parkin, LRRK2, LRRK2(D1994A) or LRRK2(S1292D). Cell lysates were immunoprecipitated with antibody against Myc or V5, and precipitates were immunoblotted with antibody indicated the right.
C) Immunostaining of the neural progenitor marker Nestin and of the post-mitotic neuronal marker b3 tubulin in control ESCs, Id1-Flag ESCs and Id1-Flag ESCs transiently over-expressing Zrf1 at day 5 of neural differentiation.
D The IC50 of 24F4A-mediated IFNα inhibition was compared to the EC50 of 24F4A-induced BDCA2 internalization.
I, J. Cumulative frequencies of diameter distributions of small vesicles and endosomes (statistics from 6 control cells and 9 KD cells). Kolmogorov-Smirnov test, P = 0.304 for (I) and P = 0.553 for (J).
(G, H) 3D views from two 232 x 232 μm2 field of views of the endothelial layer of a Tocilizumab treated infected LoC at 2 dpi, immunostaining for the tight junction protein CD31 is shown in the Spring Green LUT. Endothelial cell clusters with low CD31 expression and altered actin staining are also visible and indicated by yellow arrows.
(A) 12-day-old WT or 35S::GLV2 8-5 seedlings were treated with mock or 1 μM GLV2 for 24h before protein extraction. Western blots were probed with α-FLS2 or α-BAK1 antibodies. CBB: Coomassie brilliant blue. Data information: Similar results were obtained in 3 independent experiments.
(B) Average number of LGG-1::GFP-containing puncta in rab-10(ok1494) progeny of animals fed either control bacteria or bacteria expressing pha-4 dsRNA their entire lives; p < 0.0001, unpaired, two-tailed t-test. n, total number of seam cells observed. Error bars: ±SEM. Please see Figure 1 for details and Table S1 for quantification of data. Feeding mutants for several generations with pha-4 dsRNA, inhibited development and sharply decreased the number of eggs laid ([46], data not shown). However, the loss of many embryos was unlikely to bias our findings, since many progeny of daf-2 mutants treated with pha-4 RNAi also died but those that did not exhibited a robust autophagy phenotype (Figure 6).
Body weights of mice that had consumed a SD for 22 weeks or a HFD for 26 weeks; n=4-5. Mean ± SD. Mice are grouped to reflect their randomization to vehicle or SH-BC-893 groups, weight measured prior to treatment.
(I) The qRT-PCR analysis with total RNA isolated from control or IRGM shRNA or EtBr treated IRGM shRNA HT-29 (Rho0) cells.
D. Osmotic stress induces YAP target gene expression. Wild type (WT) or YAP/TAZ double knockout (Y/T KO) HEK293A cells were serum starved for 1 hr and treated with 0.2 M sorbitol for 4 hr. mRNA levels of CTGF and CYR61 were measured by quantitative RT-PCR and normalized to GAPDH control. Data are presented as mean ± SEM. *p < 0.05 (two tailed student's t-test, n = 3).
B. Steady-state protein levels in wild-type (WT) and FBXL4 knockout (KO) RKO cells.
K: IL-6 protein levels in supernatants from msEGCs collected after 24h treatment with ATP.
(C) RT-qPCR analysis of Fnip1 and Fnip2mRNA levels in the gastrocnemius muscle of the indicated genotypes (n = 5 mice per group).
A. Splenocytes were isolated from Ambragt/+ and wt C57/BL6mice and activated as indicated in materials and methods. At day 7 after activation, AICD was induced with 0.1μg/ml of plate-bound anti-mCD3 (Clone 17A2). Apoptotic cells were detected 12h after AICD induction by flow cytometry as AnnexinV/PI double positive cells.
Pyridostatin (PDS) was administered intravenously (i.v.; 7.5 mg/kg/day) and NU-7441 was administered intraperitoneally (i.p.; 10 mg/kg/day), over the indicated periods of time. Vertical dashed line indicates end of treatment. Tumour volume was measured at the timepoints shown on the graph and expressed relative to tumour volume at the beginning of treatment. Each experimental group included n = 5 mice. Error bars represent SEM. P values were calculated at day 39 using an unpaired two-tailed t-test, between treated and untreated tumours, or between the NU-7441+PDS combination and each single treatment. **, P ≤ 0.01; ***, P ≤ 0.001; ****, P ≤ 0.0001.
G. Alignment of the N-terminal region of Cyclin B1 that contains the MAD1 binding region. Numbering refers to the human MAD1 sequence. *conserved, negatively charged residues in MAD1 (E52K, E53K, E56K) required for MAD1:Cyclin B1 interaction.
(f) Total cell lysates (TCL) were prepared from Atg5+/+ and Atg5−/− MEFs cultured in EBSS for the indicated times and subjected to immunoblot analyses. Uncropped images of the immunoblots in a, b, d and f are shown in the Supplementary Information, Fig. S5.
(H) T47-D cells were transfected with antagomiR-10b, a dsi-RNA for PTEN or both and mammospheres produced as described in material and methods. Bars show mean and SEM from three independent experiments. * p=0.003 by Student´s T test, after ANOVA showing statistical differences in groups.
The representative xenograft tumours (top panel) and tumour growth analysis (bottom panel) of scramble and BCL9 stable knockdown cells. LF: left flank of mouse, RF: right flank. n=6 for shS1 vs. shB1, n=5 for shS1 vs. shB2.
(A-C) mRNA expression of Bmal1 (black), Rev-erbα (grey) and Per2 (red) in HIOs (A), kcHIEs (B) and bHIEs (C).
Figure 6. SLFN11 promotes the destabilization of RPA-ssDNA complex. (A-B) Loss of SLFN11 in SF268 cells delays the decline of RPA foci. Wild-type or SLFN11-deficient SF268 cells were treated with CPT (1 µM) for 1 hr. Cells were then washed, shifted to fresh medium (time 0), and processed at the indicated time points for immunofluorescence by using anti-RPA2 antibody. Representative RPA2 foci were shown (A). Scale bar, 10 µm. Quantification of RPA2 foci formation using NIH Image J software (B).
Comparison of RNA levels to protein levels. X axis is the sum over the HSP12 mRNA counts (see D). Y axis is the maximum over the Hsp12-GFP values. The red line indicates the best linear fit.
(K) Venn diagram showing the overlap between MCF7 DVL3 ChIP-seq peaks and super-enhancer targets in luminal breast carcinoma.
RNA sequencing (D, left: heatmap) and GO analysis (D, right) of untreated MECP2-KO organoids vs Nefiracetam (N = 4 samples each of ~10-15 pooled organoids) indicated that treatment upregulated genetic expression in synapse-relevant pathways.
b, Immunoblot analyses of ATF4, global protein ubiquitination, p62/SQSTM1, and MAP1-LC3-I to MAP1-LC3-II conversion in control;Bcl2 lymphomas with no ADR treatment, in TIS cells, and in TIS cells after exposure to 2DG or bafilomycin A1in vitro; representative blot with α-tubulin as a loading control (gels were cropped to ease presentation; full-length blots are provided in Supplementary Fig. 16). c, Cleavage (activation) of caspase 12 and detection of cleaved caspase 3 by immunoblot analysis of control;Bcl2 lymphomas as in b; representative blot with α-tubulin as a loading control (gels were cropped to ease presentation; full-length blots are provided in Supplementary Fig. 16).
A: STLC-synchronised mitotic (M) wild-type (WT), FAM83D-/- knockout (KO) and FAM83DGFP/GFP knockin (KI) U2OS cells were subjected to anti-CK1α immunofluorescence and GFP fluorescence microscopy. DNA is stained with DAPI. Scale bars, 20 µm.
(F) Staining by flow cytometry of EPSC, YS-EBs and matched-iMGL with indicated markers (n=3; mean ±SEM).
(d) Close-up view of the canonical and imperfect a-d' pairings. Each residue is illustrated in ball-and-stick model. Main-chain atoms are coloured blue and side-chain atoms are coloured pink for canonical pairings or golden for imperfect pairings. The a-d' packing is illustrated by van der Waals spheres depicting the side-chain atoms.
(C) Abundance profiles as determined by quantitative mass spectrometry correlate with the number of observed single particles of the corresponding structural signature within the negative-staining electron micrographs; shown for fatty acid synthase, 20S proteasome, 60S and 40S ribosome (the number of particles per image per fraction is indicated below the class averages).
(b) At 16 h post-transfection with V5-Atg3 and Flag-vFLIP with increasing amounts of GST-K-α2 or GST-K-α4, HEK293T cells were used for GST pulldown, followed by IB with anti-Flag or anti-V5 antibody or for immunoprecipitation (IP) with anti-V5 antibody, followed by IB with anti-Flag antibody. WCLs were used for IB with anti-GST, anti-Flag or anti-V5 antibody.
3D-STORM images in xy-projection of CATSPER2-/- sperm (left) labelled with the anti-CatSper 3 (upper panel) and anti-CatSper 4 (lower panel) antibody. Axial projection of the boxed regions (right). Scale bars represent 5 µm in xy-projections and 200 nm in axial projections.
Box plot representing the number of interactors of KZFPs in function of their evolutionary age. On a superimposed swarm plot, individual KZFPs interactome numbers were represented by dots. When green, the interactome of this KZFP contained 3 or more unique interactors (Fig. 3B).
(E) ATP treatment induces dissociation of IFT54 but not IFT54Δ342-356 mutant from kinesin-II. Immunoprecipitation experiments were performed as shown in (D) in the presence or absence of ATP. The normalized ratios of FLA8 and FLA10 in the immunoprecipitates (IFT54 without ATP/with ATP/mutant without ATP/with ATP) are 1:0.37:1.70:1.38 and 1:0.35:1.47:1.45, respectively.
(E) Recombinant ISG20-Fc degrades ZIKA viral RNA and HSV2 viral DNA. 50ng purified viral RNA (ZIKV) or DNA (HSV-2) were incubated with increasing concentrations of rISG20-Fc (5, 50, 500 ng) in the presence of RNase inhibitor for 90min at 37°C followed by quantification of viral titers by qRT-PCR, and agarose gel was used to evaluate the RNA degradation by electrophoresis. The representative picture of agarose gel is presented. rISG20-Fc was able to degrade both ZIKV RNA and HSV-2 DNA in a dose dependent manner; however, rISG20-Fc was more efficient in degrading viral RNA than DNA. Data represent as mean ± SEM; n=3 biological replicates; **p < 0.01. ***p < 0.001 and ****p < 0.0001 by One-way ANOVA.
(C) Effect of different truncations and deletions on AP-3 targeting to mitochondria. Indicated strains were grown at 30°C in YPG and kept in logarithmic phase. Localization of Apl5 or Apl6 and Vps41 was analysed by fluorescence microscopy. First column shows DIC image of cells. Scale bar, 5 µm. Scale bar in inset, 2 µm. (D) Quantification of (C). (-) Control corresponds to Vps41(ΔPEST)-GFP-Fis1 Apl6-mCherry (CUY12558) and (+) corresponds to Vps41(S-D)-GFP-Fis1 Apl6-mCherry (CUY12560). Apl5- /Apl6-dots co-localizing with GFP signal were counted and plotted in percent of the total number of Apl5- /Apl6-dots (n ≥ 63). Bars show the mean percentage of co-localization ± standard deviation.
(A) Convertase-labeled bacteria were exposed to a concentration range of either preassembled C5b6 (C5b6MAC) or a mixture of C5 and C6 (Conv-MAC), in the presence of 100 nM C7. After washing, 20 nM C8 and 100 nM C9-Cy3 was added. Controls at 0 nM C5b6 or C5-C6 confirm that the detected C9-Cy3 deposition is specifically related to MAC formation (solid lines). Proper insertion of pores was assessed by a previously described shaving method with trypsin (Moskovich & Fishelson, 2007). Bacteria were first incubated with MAC components for 30 minutes and subsequently treated with 20 µg/ml trypsin for 15 min at 37°C (dotted lines). Data information: (A) Data represent mean ± SD of 3 independent experiments.
(b) HeLa cells were transfected with GFP-LC3 in combination with either Bif-1SH3-HcRed, Endophilin A1SH3-HcRed or empty HcRed vector for 20 h. The cells were then cultured in 2 h or complete medium for 2 h and the number of GFP-LC3 dots per HcRed-positive cell was counted using a fluorescence microscope (mean ± s.d.; n = 46). Statistical significance in a and b was determined by Student's t-test and the asterisks indicate P 0.0001.