B5 #1 (cytochrome b5 family protein #1); heme binding / transition metal ion binding. similar to ATB5-A (Cytochrome b5 A) [Arabidopsis thaliana] (TAIR:AT5G53560.1); similar to cytochrome b5 [Ananas comosus] (GB:AAM28288.1); contains InterPro domain Cytochrome b5; (InterPro:IPR001199)