Abstract
Two new lectins, MLL 1 and MLL 2, were purified from the leaves of mulberry (Morus alba) by a procedure consisting of ammonium sulfate precipitation, affinity chromatography on a N-acetylgalactosamine-agarose column, gel filtration on a Sephacryl S-200 column, anion-exchange chromatography using a DEAE-Sephacel column and gel filtration on a Sephadex G-75 column. Both MLL 1 and MLL 2 were found to be glycoproteins with neutral sugar contents of 8.8 and 40%, respectively. They showed the same native molecular weight of 51 000. Each consisted of subunit with molecular weight of 16 500. They were highly specific for N-glycolylneuraminic acid.
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