BNEL68b12 Barley EST endosperm library Hordeum vulgare subsp. vulgare cDNA clone BNEL68b12 5' similar to Triticum aestivum subsp. aestivum partial Glu-B1-1 gene for high-molecular-weight glutenin subunit, exon 1, specimen voucher Gattersleben TRI 16762, mRNA sequence