CNTF is a pluripotent neurotrophic factor, belonging to the IL-6 cytokine family[1]. CNTF could protect retinal cone and rod photoreceptors[2]. CNTF has neuroprotective effects on a variety of central and also peripheral nervous system neurons[3]. Animal-Free CNTF Protein, Human (His) is produced by E. coli (M1-M200) with C-terminal His-tag.This product is for cell culture use only.