3.2.1.123 additional information - - 646691 3.2.1.123 4 8 about 85% activity at pH 4.0, 100% activity at pH 5.0, about 70% activity at pH 6.0, about 55% activity at pH 7.0, about 30% activity at pH 8.0 732178 3.2.1.123 7 - 90% activity for NeuAcalpha(2-3)Galbeta(1-4)Glcbeta(1-1)ceramide, 64% activity for Gg3Cer 646693