Which is the 21st amino acid?

Question

Which is the 21st amino acid? (A) Pyrrolysine (B) Selenocysteine (C) Cystine (D) Histidine

Tardigrade Admin · Accepted Answer

Selenocysteine (Sec) and pyrrolysine (Pyl) are rare amino acids that are cotranslationally inserted into proteins and known as the 21st and 22nd amino acids in the genetic code.

Q. Which is the 21^st amino acid?

Pyrrolysine

Selenocysteine

Cystine

Histidine

Selenocysteine (Sec) and pyrrolysine (Pyl) are rare amino acids that are cotranslationally inserted into proteins and known as the 21^st and 22^nd amino acids in the genetic code.

Q. Which is the 21st amino acid?