The abbreviated names for Tyrosine are Tyr or Y. Tyrosine is found in a polypeptide called Peptide YY, which "is a short (36-amino acid) protein released by cells in the ileum and colon in response to feeding. In humans it appears to reduce appetite." The pKa values are COOH - 2.20, NH3+ - 9.11, and side chain (phenol) 10.07. The isoelectric point (pH) is 5.66. An interesting fact about Tyrosine is the word comes from the the Greek tyri, which means cheese (it was first discovered in cheese). Tyrosine can be found in many high protein food products such as soy products, chicken, turkey, fish, peanuts, almonds, avocados, milk, cheese, yogurt, cottage cheese, lima beans, pumpkin seeds, and sesame seeds. In the medical field, research has shown that Tyrosine can increase plasma neurotransmitter levels (particularly dopamine and norepinephrine). I really enjoyed doing this blog and found the research very interesting. There was a lot of info on this amino acid and a short paper could be written on the subject.-The High School Chemist
Sources
- http://en.wikipedia.org/wiki/Peptide_YY
- http://en.wikipedia.org/wiki/Tyrosine
- http://www.chemie.fu-berlin.de/chemistry/bio/aminoacid/tyrosin_en.html
Looks like there was some trouble with the picture. If you would like to see it, here is the link. =)
ReplyDeletehttp://en.wikipedia.org/wiki/File:L-tyrosine-skeletal.png
Hey high school chemist this blog was great. I really liked how you came back at the end and added the website for the picture, especially since the one you have isn't working right. You are right, this amino acid seems to have a lot of information about it and from the looks of it you already did a bunch of research on Tyrosine. Some people could probably produce a decent sized research paper with the information that you have already gathered. I cannot find anything wrong with your blog, it looks like you have everything there and even a good bit of extra information, such as where you can find Tyrosine, the history, and even its meaning. On a side note, it wouldn't hurt if you formatted your references in ACS Style, plus that way anyone reading your blog can then go back and find the same information without having to search through page after page of information. Other than that, it was a great blog to read. Keep it up...Middle School Chemist.
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