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# How to calculate molecular mass of tripeptide if molecular mass of amino acid residue is 150?

By Sahil Gupta

How to calculate molecular mass of tripeptide if molecular mass of amino acid residue is 150?

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### One comment

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) 