In contrast to their similar brain abnormalities, newborn mice deficient in Apaf1 or caspase- 9 have distinctive abnormalities in their paws. Apaf1-deficient mice fail to eliminate the webs between their developing digits, whereas caspase- - 9 -deficient mice have normally formed digits (Figure Q 18-1 ). If Apafl and caspase- 9 function in the same apoptotic pathway, how is it possible for these deficient mice to differ in web-cell apoptosis? | Numerade