Recombinant Human Transferrin is a universal iron carrier capable of delivering iron to cells. Each 80kDA transferrin molecule can carry two iron ions in the ferric form. Recombinant Human Transferrin is manufactured animal free in a GMP facility and can be utilized to increase the quantity and quality of a wide range of cell types. Transferrin is also associated with the innate immune system, since its binding of iron can create decreased levels of free iron and impede bacterial survival. The activity is equivalent to human serum holo transferrin.