C3 and ocular melanoma: While there was no overall difference in expression between OM and SC for C3, by contrast the levels of C3aR were much higher in SC (C3∶0.64±0.03 vs 0.77±0.07; p = NS and C3aR: 0.83±0.06 vs 2.11±0.26; p<0.0001, respectively).