[Isolation and study of the properties of a protein factor activating proliferative processes in nerve tissue].

The method of isolation and some properties of the neutral protein activator of proliferation processes are described. The protein obtained is characterized by high lability and easily destroys treated with proteolytic enzymes and stored under any conditions. It loses the greater part of activity. Peptides formed differ in their properties from the proliferation peptide activators studied earlier and are not able to stimulate the proliferation processes in the brain tissue cells.