pulse-chase labeling of normal and multiple sulfatase deficiency ( msd ) fibroblasts showed a normal rate of synthesis of sts in msd during a 3 hour pulse but during the chase the sts of msd cells disappeared with a half-life of 4 to 6 hours until approximately 25 % of the material remained after 24 hr .
C0016030
fibroblasts
C0007634
the