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> "Roughly 500 amino acids have been identified in nature, but just 20 amino acids make up the proteins found in the human body." There are 20 used to assemb
by bigbillheck 4y ago
> "Roughly 500 amino acids have been identified in nature, but just 20 amino acids make up the proteins found in the human body."
There are 20 used to assemble human proteins, but thanks to post-translational modifications there are lot more than that in the actual proteins.
- gilleain 4y agoThere is also selenocysteine, which is cys with the sulfur replaced by selenium. https://en.wikipedia.org/wiki/Selenocysteine https://en.wikipedia.org/wiki/Selenocysteine It's not present in all organisms, but where it is, it is incorporated in proteins during translation, not after.