Glycoproteins from Teratocarcinomas and Organs of Adult Mice: Analysis by Affinity Chromatography on...

Glycoproteins were isolated from particulate fraction of four teratccarcinomas and several organs of adult mice by affinity chromatography on lectins conjugated with agarose [concanavalin A (Con A), wheat germ agglutinin (WGA), Ricinus communis agglutinin (RCA), peanut agglutinin (PNA) and Dolichos biflorus agglutinin (DBA)] and were compared by SDS gel electrophoresis. Glycoprotein components were found to be very similar in three lines of solid teratocarcinoma, namely F9, STT-2 and OTT-10A. Teratocarcinoma OTT6050, which is an ascitic form called embryoid bodies, also gave glycoprotein profiles somewhat similar to those of other teratocarcinomas. However, glycoprotein profiles of most adult organs were significantly different from those of teratocarcinomas. The following points were of special interest. 1) RCA receptors from the four teratocarcinomas gave a strong band with an apparent molecular weight 145,000 daltons, which was either weak or absent in the receptors from adult organs. 2) The WGA receptors of all adult organs except muscle and small intestine gave more intense bands than those of the teratocarcinomas. 3) Glycoproteins with molecular weights of more than 240,000 daltons were present in WGA receptors, RCA receptors and PNA receptors of teratocarcinoma OTT 6050, but not in the receptors of other teratocarcinomas.