acid ( ph 5.5 ) , free , and latent alkaline ( ph 7.4 ) rnases were assayed in homogenates of temporal cortex , hypothalamus , hippocampus , and cervicothoracic segments of spinal cord of rats at three different ages ( 5 , 14 , and 25 months old ) .
C0039485
temporal cortex
C0019564
hippocampus