Gene model and homology of common bean iron reductase gene ( Pv FRO) with other iron reductase genes from arabidopsis ( At FRO) or pea ( Ps FRO) followed by synteny analysis with Medicago and soybean chromosomes. Pfam annotation used with ferric reductase, FAD8 and NAD6 binding as major domains. Upper scale indicates nucleotide number in both the mRNA and genomic comparisons along with levels of homology. Lower horizontal bars represent each gene with intron/exon structure shown for PvFRO. SSR marker from 3' UTR indicated below gene model and CAPS marker with HindIII site indicated below genomic comparisons with soybean.