Question

If the molecular mass of an amino acid is 150 daltons the molecular mass of a tripeptide will be

Answer 1

Molecular mass of tripeptide will be 3*150 – 2*18 =414 g /mol

Because 1 molecule of water is lost by the formation of a peptide bond, and there are 2 peptide bonds between the three amino acid residues, which can also be explained by the formula

MW(AAA) = 3*(MW(A)) – 2*(MW(H2O)