title: A "new" blood factor, C1, demonstrated with extracts of seeds of the Korean Clerodendron trichotomum Thunberg.
abstract: By absorbing extracts of seeds of the Korean Clerodendron trichotomum Thunberg with selected human group O red cells, a lectin has been prepared, which defines a hitherto undescribed specificity, designated C1, defining individual differences in human red cells. The specificity C1 appears to characterize a structure associated with the A-B-H-Le marcomolecule, both of red cells and of saliva, which is distinct from the combining groups for A,B,H and Le. Moreover, the reactivity of red cells with anti-C1 lectin is destroyed by treatment of the red cells with proteolytic enzymes, unlike the reactions for A,B,H and Le.
mesh_terms: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D000939:Epitopes; D005361:Ficain / Q000494:pharmacology; D006801:Humans; D007518:Isoantibodies / Q000302:isolation & purification; D007723:Korea; D012463:Saliva / Q000276:immunology
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D000939:Epitopes; D007518:Isoantibodies; D005361:Ficain