ABSTRACT
Variable subgroups of both chains of a human monoclonal anti-RH(D) IgG1 (kappa), QA37C3G6, were determined from their N-terminal sequences. Sequence comparison with corresponding chains of other human antibodies indicated that the light chain belongs to the third subgroup of human kappa-light chains while the heavy chain belongs to the second subgroup of human heavy chains.
Subject(s)
Antibodies, Monoclonal/immunology , Rh-Hr Blood-Group System/immunology , Amino Acid Sequence , Antibodies, Monoclonal/chemistry , Humans , Hybridomas/metabolism , Immunoglobulin Heavy Chains/chemistry , Immunoglobulin Light Chains/chemistry , Molecular Sequence Data , Tumor Cells, CulturedABSTRACT
Antibody H2D5D2F5 is a human monoclonal anti-Rh(D) IgG1 (lambda) produced by Epstein-Barr virus-immortalized B lymphocytes from a healthy donor. The complete amino acid sequence of the light (L) chain, with the exception of positions 94-97, was determined by Edman degradation of the intact chain, containing 30 residues, and derived tryptic and thermolytic peptides. Sequences of the peptides were aligned by comparison with the sequences of previously reported L chains. H2D5D2F5 L chain belongs to the first variable subgroup of human chains. Its sequence does not reveal striking differences when compared to those of other human lambda chains issued from myeloma or hybridoma.
