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Structure of human CYP1B1 with ANF bound. Residues in red are those within 7 Å of ANF. (A) The F and G helices are at top and the I helix is behind ANF. The BC helix has been removed from the foreground. (B) Top-down view compared with A. The BC helix is shown upper left, and the F and G helices have been removed from the foreground.
