[The nature of factors inactivating postural asymmetry factor at the initial stages of compensatory reconstruction in animals with unilateral lesions of the motor neocortex].

The disappearance of posture asymmetry factor activity in the CSF after three weeks of unilateral removals of the neocortex motor region is caused by inactivation factors (IF), which are thermolabile proteins with m.v. about 80 kD and 150 kD. One of IF (150 kD) interacted with protein A which shows its immunoglobulin++ nature.