There's a question in the AAMC Section Bank that says that IN (integrase) is a 288-residue protein, and it's asking what the molecular weight would be of an inactive tetramer of IN. The solution says that since the integrase monomer is composed of 288 amino acids, it will have a ~32 kDa, and thus the answer is 128 kDa for the size of a tetramer. How did they get the 32 kDa?? Is there a formula for this kind of question?
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