How many amino a. are there? my teacher says 21 and she is asking the name and structure of the 21st one??

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How many amino a. are there? my teacher says 21 and she is asking the name and structure of the 21st one??

2007-06-26 03:48:10 · 3 answers · asked by lotsaqs?? 1 in Science & Mathematics ➔ Chemistry

3 answers

I'm thinking it's probably Selenocysteine

http://en.wikipedia.org/wiki/Selenocysteine

2007-06-26 04:34:53 · answer #1 · answered by hawkeye3772 4 · 0⤊ 0⤋

there are billions of amino acids. but naturally occurring, proteinogenic ones are 20. well, actually 21.
the so-called 21 is a Se-containing.
http://www.albany.edu/faculty/cs812/bio366/selenocysteine_ppt.pdf

2007-06-26 03:57:17 · answer #2 · answered by chem_freak 5 · 0⤊ 0⤋

Look, they give you some advices in link

2007-06-26 03:53:29 · answer #3 · answered by maussy 7 · 0⤊ 0⤋