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The 5′‐flanking region of the S 12 -, S 13 -, S 21 -RNase with a length of 854bp, 1448bp and 1137bp were successfully isolated by TAIL-PCR from genomic DNA from ‘Jinhua’, ‘Maogong’ (Pyrus pyrifolia) and ‘Yali’ (Pyrus bretschneideri) genomic DNA. Sequence alignment and analysis of S 13 -, S 12 -, S 21 -RNase gene promoter sequences with S 2 -,...
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