title: [Structural and immunochemical studies of carp (Cyprinus carpio L.) immunoglobulin. V. Tryptic fragments of carp (Cyprinus carpio L.) immunoglobulin M].
abstract: Carp IgM, isolated from normal serum is more sensitive to trypsinization compared to a human myeloma protein IgMGo. Under the same conditions (treatment with trypsin at 56 degrees C for 30 min) carp IgM was degraded to small, mostly dialysable peptides to a larger extent than IgMGo. In both cases the fragmentation resulted in immunoelectrophoretically pure Fab mu and Fc mu fragments. The Fab mu fragments of human IgM (yield: 20% of used IgM material) had a molecular weight of 54,000, the Fc mu fragments (yield: 30%) were a heterogenous mixture as far as molecular sizes concerned with values of about 300,000. For the corresponding fragments of carp IgM we could analyze a molecular weight of about 43,000 for Fab mu (yield: 8%) and for Fc mu (yield 10%) three fractions of 160,000, 130,000 and 90,000. The reductive subunits of Fc mu fragments showed different molecular weights: 39,000 for IgMGo and 45,000 for carp IgM. The anti-fragment antisera prepared in rabbits were monospecific as demonstrated by immunodiffusion.
mesh_terms: D000818:Animals; D002347:Carps / Q000276:immunology*; D002850:Chromatography, Gel; D003530:Cyprinidae / Q000276:immunology*; D000939:Epitopes; D006801:Humans; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007140:Immunoglobulin Fab Fragments / Q000032:analysis* / Q000276:immunology; D007141:Immunoglobulin Fc Fragments / Q000032:analysis* / Q000276:immunology; D007075:Immunoglobulin M / Q000032:analysis* / Q000276:immunology; D008970:Molecular Weight; D014357:Trypsin / Q000378:metabolism; D008258:Waldenstrom Macroglobulinemia / Q000276:immunology
chemical_list: D000939:Epitopes; D007140:Immunoglobulin Fab Fragments; D007141:Immunoglobulin Fc Fragments; D007075:Immunoglobulin M; D014357:Trypsin
vernacular_title: Strukturelle und immunchemische Untersuchungen am Immunglobulin des Karpfens (Cyprinus carpio L.). V. Tryptische Fragmente des Immunglobulins M des Karpfens (Cyprinus carpio L.).