Qs. Decode the given protein sequence: “WATER”. What is the overall charge present on this protein. a) 0 (neutral) b) +1 c) -1 d) +2

Ans. Please note that “W ” is the single letter code for “Tryptophan”, ‘A’ for “Alanine”, ‘T’ for “Threonine” , ‘E’ for “Glutamic acid” and ‘R’ for “Arginine”.

Try-Ala-Thr-Glu-Arg = WATER

Charge on Glu is -1; and charge on Arg is +1. Try, Ala and Thr is neutral, with charge 0, so, net charge on this protein sequence “WATER” is 0.