Purity ~90% (SDS-PAGE). Binds specifically to cytosolic chaperonin (c-CPN) and transfers target proteins to it. Binds to nascent polypeptide chain and promotes folding in an environment in which there are many competing pathways for nonnative proteins. Source: Recombinant protein corresponding to aa2-122 from human PFDN1, fused to GST-Tag at N-terminal expressed in E. coli. Molecular Weight: ~41.1kD AA