“The apparent KM for oestradiol was 1.59 X 10(-6) M. All three androgens inhibited the metabolism of oestradiol …: ADIOL, 2.05 X 10(-6) M; DHA-S and DHA, 1.59 X 10(-6) M. However, ADIOL … oestradiol for the active enzyme site … sulphate was non-competitive.”