Hello. Can anyone tell me how benzidine interacts with hemoglobin in a niDAB stain? Thank you, Rachael Rachael L. Emerson Center for Human Genetics and Molecular Pediatric Diseases University of Rochester Medical Center 575 Elmwood Avenue MRBX 1.11301 Rochester, NY 14642 Tel (585) 275-5073 Fax (585) 506-0233