WNEL5g7 Wheat EST endosperm library Triticum aestivum cDNA clone WNEL5g7 5' similar to A.crassa chloroplast genes rbcL, psaI, ORF 185 and ORF 230 for large subunit of ribulose 1,5 bisphosphate carboxylase/oxygenase and apoprotein I, mRNA sequence