Cerebellins (CBLN1–4), together with C1qTNF proteins, belong to the CBLN subfamily of C1q proteins. Cerebellin-1 (CBLN1) is active in synapse formation and functions at parallel fiber-Purkinje cell synapses. form tripartite complexes neurexins glutamate-receptor-related proteins GluD1 GluD2, playing a role as trans-synaptic cell-adhesion molecules that critically contribute both functioning bra...