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Rats immunized with T. rex tissue extracts produce antibodies that recognize hemoglobin. Antisera drawn from rat IN9 before and after the immunization procedure were compared at increasing dilutions for reactivity against purified turkey hemoglobin by ELISA. The intensity of absorbance measured at 405 nm is directly proportional to the quantity of anti-hemoglobin antibodies present in each serum. No reactivity of the antisera with components of sandstone and plant extracts was noted.
