Three Protected Tetrapeptides
Fenude, E.; Casalone, G.; Acta Crystallographica Section C 52 (1996) 973–978; doi:10.1107/S0108270195013345

data_2004682
_publ_section_title
;
 Three Protected Tetrapeptides
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              973
_journal_page_last               978
_journal_paper_doi               10.1107/S0108270195013345
_journal_volume                  52
_journal_year                    1996
_chemical_formula_moiety         'C25 H38 N4 O7,2H2 O'
_chemical_formula_sum            'C25 H42 N4 O9'
_chemical_formula_weight         542.63
_chemical_name_common            'Boc-Gly-Gly-(D)-Phe-(L)-Nle-OMe dihydrate'
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.8790(10)
_cell_length_b                   9.3440(10)
_cell_length_c                   35.674(4)
_cell_measurement_reflns_used    48
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      10.6
_cell_measurement_theta_min      4.5
_cell_volume                     2959.7(6)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Fait, 1991)'
_computing_data_reduction        XSCANS
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  SHELX93
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0235
_diffrn_reflns_av_sigmaI/netI    0.0576
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       42
_diffrn_reflns_limit_l_min       -42
_diffrn_reflns_number            5913
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.25
_diffrn_standards_decay_%        3.16
_diffrn_standards_interval_count 197
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.093
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.218
_exptl_crystal_density_meas      ?
_exptl_crystal_description       Prism
_exptl_crystal_F_000             1168
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.48
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.119
_refine_diff_density_min         -0.152
_refine_ls_extinction_coef       0.0061(7)
_refine_ls_extinction_method     'SHELXL93 (Sheldrick, 1993)'
_refine_ls_goodness_of_fit_all   1.018
_refine_ls_goodness_of_fit_obs   1.094
_refine_ls_hydrogen_treatment
;
 H atoms were refined with restraints (DFIX of SHELXL).
 Isotropic B's of methyl groups were constrained to have the same value.
;
_refine_ls_matrix_type           full
_refine_ls_number_parameters     494
_refine_ls_number_reflns         5225
_refine_ls_number_restraints     62
_refine_ls_restrained_S_all      1.017
_refine_ls_restrained_S_obs      1.092
_refine_ls_R_factor_all          0.0808
_refine_ls_R_factor_obs          0.0455
_refine_ls_shift/esd_max         0.391
_refine_ls_shift/esd_mean        0.043
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0411P)^2^+0.0967P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1043
_refine_ls_wR_factor_obs         0.0917
_reflns_number_observed          3647
_reflns_number_total             5225
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            as1206.cif
_cod_data_source_block           III
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.0411P)^2^+0.0967P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to 'w =
1/[\s^2^(Fo^2^)+(0.0411P)^2^+0.0967P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
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_cod_database_code               2004682