CYP21A2 mRNA and protein are present in the human developing lung.
CYP21A2 is expressed in the distal epithelium of the human fetal lung.
Low CYP17A1 protein levels are present in the human developing lung.
CYP11B1 and CYP11B2 are not expressed in the tested fetal human lung samples.
A role for CYP21A2 in intracrine glucocorticoid action is suggested.