PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6804944-3 1982 The isolated IgG-binding proteins specifically bound to IgG2a, but not to IgG2b, whereas the isolated phosphatidylcholine-binding proteins specifically bound to IgG2b but not to IgG2a. Phosphatidylcholines 102-121 immunoglobulin heavy constant gamma 2B Mus musculus 161-166 6804944-5 1982 The noted enzymatic activity was augmented 4-fold by preincubating phosphatidylcholine-binding proteins with heat-aggregated murine IgG2b but not with IgG2a. Phosphatidylcholines 67-86 immunoglobulin heavy constant gamma 2B Mus musculus 132-137