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Name: Steven
Status: Student
Grade:  Other
Location: Outside U.S.
Country: Greece
Date: Spring 2010


Question:
Are there more than 20 amino acids on earth?



Replies:
Steve,

Twenty-two amino acids are naturally incorporated into polypeptides and are called proteinogenic or standard amino acids.

Aside from the twenty-two standard amino acids, there are also a vast number of "non-standard" amino acids.

Please see the following URL for full coverage of this question.

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

Sincere regards,
Mike Stewart


Yes, but only 20 that are commonly occurring in proteins.

Ron Baker, Ph.D.


Yes! http://en.wikipedia.org/wiki/Amino_acid

Burr



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