How many different primary structures could be formed using the four amino acids alanine, phenylalanine, serine...

How many different primary structures could be formed using the four amino acids alanine, phenylalanine, serine and valine? Write the amino acid sequences (using the three letter code) of all the possible peptides that begin with phenylalanine. You must use each amino acid once and only once in each peptide.

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queen_honey_blossom answered 1 year ago

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