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Aminopropyltransferase

An enzyme that catalyzes the Transfer of the propylamine moiety from 5'-deoxy-5'-S-(3-methylthiopropylamine)sulfonium Adenosine to Putrescine in the biosynthesis of Spermidine. The enzyme has a Molecular Weight of approximately 73,000 kDa and is composed of two subunits of equal size.