Changes in the transaminase activities in the middle and posterior silk-gland tissues of eri-silkworm, Philosamia ricini, in relation to spinning process.

The middle silk gland tissue of eri-silkworm exhibits a higher glutamate-oxaloacetate transaminase activity (about twice) than that of the glutamate-pyruvate transaminase, while the posterior silk gland tissue exhibits a higher (three to four times) glutamate-pyruvate transaminase activity than that of the glutamate-oxaloacetate transaminase.