FDR is one of the differential screened clones from cDNA expression library of Fe-deficient induced maize root. The fdr is a 3.3kb fragment containing a l,068bp ORF1 and a 648bp ORF2, called fdrl and fdr2 respectively.

• fdr片段是由缺铁诱导的玉米根cDNA文库经免疫学筛选得到的阳性克隆之一，其全长为3.；3kb，经ORF Finder分析发现包含有两个大小为1；068bp和648bp的开放阅读框，分别命名为fdr1和fdr2。