Claim: Fresolimumab is a human protein, with a target of TGF Beta one, two and three, and a molar mass of 144388.22 g-mol.
Evidence: Fresolimumab (GC1008) is a human monoclonal antibody and an immunomodulator. 
A monoclonal antibody (mAb or moAb) is an antibody made by cloning a unique white blood cell. Various proteins can also be separated along with the anions based on their isoelectric point (pI). In proteins, the isoelectric point (pI) is defined as the pH at which a protein has no net charge. When the pH > pI, a protein has a net negative charge, and when the pH < pI, a protein has a net positive charge. Since we are dealing with proteins, properties such as charge and affinity are not consistent and vary with pH as molecules are protonated and deprotonated, while size stays relatively constant. A much quicker, single-step method of separation is protein A/G affinity chromatography. The antibody selectively binds to protein A/G, so a high level of purity (generally >80%) is obtained. Fresolimumab Whole antibody Human TGF beta 1, 2 and 3 144388.22 g·mol