Ciba Corning Diagnostics Corp.

Martha Vail

Michael K Hoskins

Robert E Megraw

Reagents useful for steroid receptor assays containing both progesterone and estrogen receptors and methods. The reagents of the instant invention contain both estrogen and progesterone receptors in a stabilized format. A preferred embodiment includes target tissue material obtained from calf uteri having the required receptors, HEPES suspending buffer, a binding site activation inhibitor, dithiothreotol, plexiform stabilizing matrix means and an amount of inactive protein added as necessary to meet predetermined total protein levels.

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Huntington Beach, CA, United States of America

Martha Vail