MSBP1 (MEMBRANE STEROID BINDING PROTEIN 1). Identical to Membrane steroid-binding protein 1 (MSBP1) [Arabidopsis Thaliana] (GB:Q9XFM6;GB:Q9LTJ7); similar to ATMP2 (MEMBRANE STEROID BINDING PROTEIN 2), heme binding / transition metal ion binding [Arabidopsis thaliana] (TAIR:AT3G48890.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN62209.1); contains InterPro domain Cytochrome b5; (InterPro:IPR001199)