a 150,000-g supernatant from axoplasm of the giant axon of the stellate nerve of the squid and from rat sciatic and goldfish optic nerves was found to be able to incorporate covalently [ 3h ] putrescine and [ 3h ] spermidine into an exogenous protein ( n , n'-dimethylcasein ) .
C0034170
putrescine
C0037871
exogenous