the average sphingomyelinase activity of fibroblasts obtained from 12 niemann-pick type c patients was 37.9 % of that of normal fibroblasts ( 27.2 versus 72 nmol ( mg protein ) -1 h-1 ) when the cells were cultured in minimum essential medium containing 13 % fetal bovine serum .
C0016030
fibroblasts
C0007634
cells