scilearner Posted February 25, 2011 Share Posted February 25, 2011 The question is give an example of post translational modifcation of a protei brought about my vitamin A. Now I checked my book which says vitamin A plays a role in vision, reproduction, growth, maintenance of epithelial cells. I checked the net as well couldn't find the answer . Can anyone tell me the name, so I can search info about it, some info would also be good if possible. Thanks Link to comment Share on other sites More sharing options...
Horza2002 Posted February 25, 2011 Share Posted February 25, 2011 Ive just done a quick literature search and can;t find much about it either...are you sure its Vitamin A? Link to comment Share on other sites More sharing options...
scilearner Posted February 26, 2011 Author Share Posted February 26, 2011 Ive just done a quick literature search and can;t find much about it either...are you sure its Vitamin A? Thanks for trying to help I found the answer. It is retinal combining with glycine of opsin in the visual cycle. You don't expect that to be a post translational modification, but it seems that any any chemical modification to a protein after it has been synthesized by the ribosome as a post-translational modification. Link to comment Share on other sites More sharing options...
Horza2002 Posted February 26, 2011 Share Posted February 26, 2011 Arr ok I was looking for something that modified it will it had literally just been transcribed. I guess though, if you think about it, any further chemical change would be post-translationl seeing as it has occured after the protein was made...even if that modification occurs hours/days/weeks latter in another part of the body. Link to comment Share on other sites More sharing options...
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