English to Polish Medical Medical: Pharmaceuticals

A biologics product comes from a biological source, generally for large molecules in protein derivatives, as compared to traditional pharmaceutical products which are derived from natural or synthetic chemicals and are generally smaller, simpler molecules.

czy ktos wie o co chodzi w tym fragmencie "generally for large molecules"?? jak to sie ma do calosci? ja jakos nie moge tego polaczyc w jedna sensowna calosc