in cultures demyelinated by exposure to anti-whole cns tissue serum plus complement , the activity of 2',3'-cyclic nucleotide 3'-phosphohydrolase ( ec 3.1.4.37 ) was decreased 70 % , whereas in cultures that did not show morphological changes with complement-inactivated anti-cns serum or anti-myelin basic protein serum , the activity was 30 % lower than in control cultures .
C0009498
complement
C0229671
serum