1. Surface molecules of b cell Surface receptor 1)B cell antigen receotor (BCR) 2) BCR coreceptor 3)Cytokine receptor(CKR) Surface functional moleculesSurface receptor 1) B cell antigen receotor (BCR) 2) BCR coreceptor 3) Cytokine receptor（CKR） 1. Surface molecules of B cell Surface functional molecules