Abstract
Aromatase cytochrome P-450 (P-450 arom) was purified from human placental microsomes. Preparations exhibit a single major band of approximately 55 kDa on SDS-polyacrylamide gel electrophoresis and have a specific content of 11–13 nmol P-450/mg protein. The purified enzyme exhibits spectral properties typical of ferric and ferrous forms of cytochromes P-450. Full enzymatic activity can be reconstituted with rabbit liver P-450 reductase, and catalytic characteristics similar to aromatase in microsomes are observed. Rabbit antibodies to purified P-450arom were affinity purified and show high specificity and sensitivity on immunoblots.
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