1.14.15.33 cytochrome P450 - 744239 1.14.15.33 ferredoxin [iron-sulfur] cluster - 744239 1.14.15.33 heme CYP107L2 shows a low-spin state of heme. Heme is sandwiched between helices I and L in the conserved way of P450 structures. The I-helix crosses the center of CYP107L2 in a slightly bent form over the heme structure, while helices F and G are stacked onto the I-helix to form a wide-open substrate-binding cavity just above the heme moiety 744239