Talk:Glycine

message: This does not belong in the category of photographic chemicals. Nowhere in the article does it mention photography, or its use in film making, or any other sort of chemical relation to photography in any way, shape or form. I'm removing it from this category as per the reason I just gave. Cernen Xanthine Katrena 10:40, 23 January 2006 (UTC)
replies: text: I have removed the Glycin redirect and replaced it with a Glycin article, as Glycin and Glycine are two different things entirely. Cernen Xanthine Katrena 19:03, 23 January 2006 (UTC)
thread_title:  Photography and Glycine 

message: Is glycine a zwitterion? If so, then there is incongruity as glycine states that it is non-polar, but zwitterion suggests that it is polar. Anyone know? Ydnagaj 20:29, 6 February 2007 (UTC)
replies: text: I note that an anonymous editor changed polar to nonpolar in November, I just changed it back.  I'm an organic chemist, not a biochemist, but as far as I know all standard amino acids are zwitterions, at least in aqueous solution.  I assume that the term "polar amino acid" is a relative term, meaning that something like phenylalanine with a hydrocarbon group attached would class as a "nonpolar amino acid" (though still a zwitterion).  Can a biochemist please confirm that I'm not talking through my hat? Walkerma 06:01, 11 February 2007 (UTC)
thread_title:  Glycine a zwitterion? 

message: 1. I am not a chemist.
2. I am confused: ...
* "it [glycine] is synthesized in the body from other metabolites, including glycine". The way this comes out sounds a bit funny (no offense), at least to me - what would be the energetic gain of resynthesis? glycine -> glycine?
* Also, the language could be improved a little. Eg. "Glycine is [a] unique amino acid that is not optically active." However, I am uncertain whether this sentence is relevant - it seems to have resulted from a discussion on the talk page (I haven't checked history). What it is not is not all that interesting, but I am sure a biochemist could enlighten (pun intended) me on the importance of the difference between photoreactive amino acids vs. non-reactive, perhaps for another wiki article (hint: link).
* Given prior discussion on the talk page, perhaps "...should not be confused with glycin" or similar could be included in the very beginning as a note with a link.
I have not made any edits, these are just thoughts. I leave that for the chemists.
3. Overall, the article is an interesting read ranging from the neurochemical function in the brain to the possible astrochemical occurence in space.
4. At least one of my four comments is useless.
In response to 2: I agree, the first point makes no sense.  Changing the last glycine to serine does.  Optical activity results from chirality, so it would be more to the point to state that glycine is not chiral, unlike all the other biological amino acids. Qchristensen (talk) 03:06, 2 November 2008 (UTC)
thread_title:  Some thoughts: glycine <-> glycine 

message: In the section "Presence in the interstellar medium" the statement is made that if glycine is found in the interstellar medium, then  "[This] finding would indirectly support the idea of panspermia, the theory that life was brought to Earth from space." For this assertion to be logically consistent one must presuppose that this glycine was produced by, or was the progenitor of, a living entity which predates life on Earth which was then brought to Earth. No evidence has been cited to support these predicates.
I am removing the logically inconsistent statements from the article.
Mtiffany71 01:30, 29 June 2007 (UTC)
thread_title:  Logical fallacy in the section "Presence in the Interstellar medium" 

message: Tagged for these reasons:
* Only US manufacturers are presented as examples.
* Only US import tariffs are mentioned. There is no mention of any import tariffs for any other country.
--<SPAN STYLE="font-family:monospace; color:#008800; background-color:#ffffcc; border:1px solid #ff4444;"> B.D.Mills </SPAN> (T, C) 01:25, 24 June 2008 (UTC)
thread_title:  Globalize/US 

message: This article talk page was automatically added with  banner as it falls under :Category:Food or one of its subcategories. If you find this addition an error, Kindly undo the changes and update the inappropriate categories if needed. The bot was instructed to tagg these articles upon consenus from WikiProject Food and drink. You can find the related request for tagging here . Maximum and careful attention was done to avoid any wrongly tagging any categories , but mistakes may happen... If you have concerns , please inform on the project talk page -- TinucherianBot (talk) 06:49, 4 July 2008 (UTC)
thread_title: [[WP:FOOD|WikiProject Food and drink]] Tagging

message: Dear Manager
In the Picture (Molecular Show) of Glycine you show the Blue Nitrogen in wrong form because Nitrogen has a three capacity and after connection to Carbon must be Has two Hydrogen but you show this nitrogen Connected to Carbon and has one Hydrogen excess. Please Check this subject and informed me by email.
Best regards
Arash Goshtasbi Asl 
Senior researcher of Petrochemical Engineering from Iran
ArashGoshtasbi
:The pictures can be confusing because some show the ammonium tautomer of glycine and some show the form where the acidic proton is on the carboxylate. In the ammonium tautomer, nitrogen has four bonds instead of three + the lone pair of electrons.
--Smokefoot (talk) 04:42, 15 August 2009 (UTC)
thread_title: Structure of glycine

message: Are you sure Gly has two H as its 'side chain'? I think every alpha-aminoacid has an alpha-C bound to four groups or atoms: COOH, NH2, H and side chain. This H, present in every alpha-aminoacid, is not a part of the side chain. So, if I'm not wrong, Gly has one H side chain. Miguelferig (talk) 20:29, 9 July 2011 (UTC)
thread_title: Gly side chain

message: The GEO web site was added as a reference and as an external link.  Looking at the web site, it only indicates that they supply glycine, not how they supply it,  therefore its inclusion as reference 9 is flawed.  The inclusion of the web site in the External Links is strictly spam.  Both need to be removed.  I have removed them once and was reverted.  WP:COI perhaps?JSR (talk) 16:01, 4 October 2012 (UTC)
thread_title:  GEO Web site addition is spam 

message: I've removed this structure for various reasons.
#It's in the wrong place
#It conflicts with the structure at the top of the article
#The caption is nonsense
#The carboxylate is not delocalized
It is very dispiriting to see comments (above) that the delocalized structure might be too difficult. For whom? The fact is that in the zwitterionic form the two C-O bonds are identical in length etc. This is independent of any particular bonding theory. Therefore it is not satisfactory to show a structure with one single bond and one double bond. At the very least, in valence bond theory, the two canonical forms should be shown as being in resonance. Personally I prefer the dotted line shown in the info box.
The nature of glycine in aqueous solution is that there is an equilibrium between the two forms, with the zwitter ion predominating. The ratio of concentrations of the two microspecies is independent of the glyine concentration and of pH; it's simply the equilibrium constant for isomerization. Petergans (talk) 18:02, 15 September 2013 (UTC)
thread_title:  Structure - again! 

message: Hello fellow Wikipedians,
I have just added archive links to  on Glycine. Please take a moment to review my edit. If necessary, add  after the link to keep me from modifying it. Alternatively, you can add  to keep me off the page altogether. I made the following changes:
*Added archive https://web.archive.org/20130613040728/http://www.geosc.com/consumeradditives/default.aspx to http://www.geosc.com/consumeradditives/default.aspx
When you have finished reviewing my changes, please set the checked parameter below to true to let others know.
Cheers. —cyberbot IITalk to my owner:Online 05:14, 26 August 2015 (UTC)
thread_title:  External links modified 

message: Wikipedia now says:
"Certain drug formulations include glycine to improve gastric absorption of the drug.[25]"
The link 25 is broken. Can you find more information of this?
Also it would be nice to learn more about this buffering:
"Glycine serves as a buffering agent in antacids, analgesics, antiperspirants, cosmetics, and toiletries".
"It serves as a buffering agent, maintaining pH".
91.155.24.127 (talk) 07:15, 20 September 2017 (UTC)
thread_title:  Glycine: Improves gastric absorption of drugs? //Serves as pH buffer in medicines and other stuff? 

message: I confuse Glycine with Glycerol Speed57 (talk) 16:18, 21 February 2018 (UTC)
thread_title:  Not to be confused with Glycerol 

message: I dont understand how is there only 1 hydrogen atom but there are 2 atoms not in the structure. Can someone tell me how is this possible? Muonium777 (talk) 06:30, 2 November 2021 (UTC)
thread_title:  Can't understand the structure 

message: proposes that Glycine hydrochloride be merged into Glycine. Reba16, to start the discussion please describe why you think the articles should be merged. Mdewman6 (talk) 00:30, 3 November 2021 (UTC)
replies: text: In general, I don't think Wikipedia needs separate articles for a chemical compound and one of its salts, unless there is significant independent notability.  That is not the case here.  In addition, I agree with User:Smokefoot's comment that the article is not suitable for mainspace (it hasn't changed much since that 2012 comment).  Therefore, I suggest merging into glycine (or just redirecting there). 
–Mdewman6 (talk) 06:43, 3 November 2021 (UTC)
replies: text: I have now merged to the two articles.  Reba16 (talk) 23:54, 10 December 2021 (UTC)
thread_title:  Merger proposal 

message: Pyrolysis of glycine or glycylglycine gives 2,5-diketopiperazine, the cyclic diamide
Pyrolysis usually includes a breakage of C-C bonds. This is simply a second condensation step.
--46.232.229.52 (talk) 14:40, 28 February 2022 (UTC)
thread_title:  Pyrolysis 

message: sulfamic acid is simpler 59.102.93.132 (talk) 01:00, 30 March 2022 (UTC)
thread_title:  sulfamic acid 

message: Why Ghycine Attach With Carboxyl  Acid and Amino Acid 182.189.213.48 (talk) 16:08, 9 June 2022 (UTC)
thread_title:  Protein 

message: I have added content to Glycine#As_a_toxin_conjugation_agent. Please review and check it for grammar. Also I wanted to add the following:
But I hesitate in references quality. Tosha Langue (talk) 14:51, 27 January 2024 (UTC)
replies: text: I do not recommend adding the  "Wide uncontrolled use of benzoates as food preservatives ..."  First of all, its hyperbole, to be polite.  Second is the flag of bullshitters:  "Researchers" say this and that.--Smokefoot (talk) 16:14, 27 January 2024 (UTC)
replies: text: @Smokefoot, understood! Tosha Langue (talk) 16:21, 27 January 2024 (UTC)
thread_title:  Please review my edit and check it for grammar