... plant heme oxygenase isoform-1 from Glycine max (soybean) ) coordination structure of the heme complex and catabolism of heme Tomohiko Gohya1, Xuhong Zhang2, Tadashi Yoshida2 and Catharina T. ... at the same time, distinct absorption bands of oxyhemeappeared at 540 and 579 nm. Then, a broad bandappeared at around 660 nm, and was maximal 9–12 minafter initiation of the reaction. The ... estimated directly from the values of absorbance at these maxima (data notshown). The estimated association constants for imi-dazole and azide binding to heme GmHO-1 are sum-marized and compared...