抄録
A lipopolysaccharide, serratigen was isolated with weak acid extraction from the organisms of Serratia marcescens, and the purification and characterization were made. It had antigenic activity for rabbit antiserum and the total carbohydrate content was 75% and the molecular weight was 12600. A mannan was isolated from the same strain and had no antigenisity and the total carbohydrate content was 100% and the molecular was 10100.
