Carbohydrate Moieties of Human Seminal Plasma Arylamidases*

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Abstract
Human seminal plasma contains two arylamidases that differ considerably with respect to their antigenic structures, molecular weights and electrophoretic mobilities. Both enzymes are glycoproteins with different carcohydrate moieties. With the aid of precipitating lectins, the faster migrating arylamidase I was found to possess a PHA receptor (beta-Gal-GNAc-(Man)2-GNAc) with terminal N-acetyl-neuraminic acid groups. The carbohydrate moiety of arylamidase II consists of at least 2 types of carbohydrate chains: A disaccharide (beta-Gal(1-3)GalNAc) reacting with the lectin from Arachis hypogoea and in addition a chain containing the PHA receptor. This chain probably contains a terminal neuraminic acid group and a terminal fucosly group.