Top ten Autodock poses divided into four groups of conformations. A. Conformation 1 (pose 2 and 6), MeLeu9 nearest the heme-iron center. B. Conformation 2 (pose 8 and 9), MeLeu4 nearest the heme-iron center. C. Conformation 3 (Pose 1, 3, 4, 7 and 10), Abu2nearest the heme-iron center. D. Conformation 4 (Pose 5), Ala7 nearest the heme-iron center. The distances between the nearest amino acids to the heme-iron center are labelled by black dashed lines.