the antisera to three isoenzymes ( alpha alpha , alpha gamma , and gamma gamma ) of the rat neurospecific enolase were studied . gamma gamma-antiserum administered into the brain cistern ( 8 microliters ) prior to learning , in contrast to two other antisera , impaired the retrieval of passive avoidance response within 1-28 days after learning .
C0006104
brain
C0023185
learning