CR1:C3bBb, C4bC2a complexes CR1:C3b CR1:C4b Displacement of C2a/Bb by CR1 Authored: Jupe, S, 2010-10-26 Complement Receptor 1 (CR1) displaces the activated enzyme components Bb and C2a from the conventional and alternative C3 convertases C4bC2a and C3bBb, respectivley. Edited: Jupe, S, 2010-11-01 Pubmed10531307 Pubmed11694537 Pubmed293688 Reactome Database ID Release 43977629 Reactome, http://www.reactome.org ReactomeREACT_118692 Reviewed: Bradley, DT, 2012-02-13 Reviewed: Fraczek, LA, 2012-02-13