General Notes
Mouse anti Human complement factor B antibody, clone 032B-32.15.1 (10-09) recognises the Bb fragment of 90 kDa human complement factor B, present in blood serum. C3b associates with complement factor B, inducing conformational change which enables complement factor D to cleave the N-terminal of complement factor B, the Ba subunit, leaving the 63 kDa Bb subunit associated with C3b and forming C3 convertase. Subunit Bb is involved in the proliferation of preactivated B lymphocytes. Conversely, Ba inhibits lymphocyte proliferation.