All
 D12 Amino Acids, Peptides, and Proteins D000602 +
 D12.776 Proteins D011506 +
 D12.776.422 Hemeproteins D006420 +
 D12.776.422.220 Cytochromes D003580 +
 D12.776.422.220.453 Cytochrome P-450 Enzyme System D003577 +
 D12.776.422.220.453.915 Steroid Hydroxylases D013250 +
 D12.776.422.220.453.915.099 Aromatase D001141 
 D12.776.422.220.453.915.212 Cholesterol Side-Chain Cleavage Enzyme D002786 
 D12.776.422.220.453.915.200 Cholesterol 7-alpha-Hydroxylase D002790 
 D12.776.422.220.453.915.720 Steroid 11-beta-Hydroxylase D013252 
 D12.776.422.220.453.915.730 Steroid 12-alpha-Hydroxylase D013253 
 D12.776.422.220.453.915.748 Steroid 17-alpha-Hydroxylase D013254 
 D12.776.422.220.453.915.760 Steroid 21-Hydroxylase D013255 
 D12.776.422.220.453.915.400 25-Hydroxyvitamin D3 1-alpha-Hydroxylase D015090 
 D12.776.422.220.453.915.050 Aldosterone Synthase D019405 
 D12.776.422.220.453.915.737 Steroid 16-alpha-Hydroxylase D039181