Human transferrin detected by the mouse monoclonal antibody HTF-14. 1. hTransferrin: 5 ug/well (red. con.) 2. hTransferrin: 3 ug/well (red. con.) 3. hTransferrin: 1 ug/well (red. con.) M: Low Range marker (Bio-Rad) 4. hTransferrin: 1 ug/well (non-red. con.) 5. hTransferrin: 3 ug/well (non-red. con.) 6. hTransferrin: 5 ug/well (non-red. con.)