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Tissue- and species-specific expression of the β-amylase gene. A, Total RNA from leaves, stems, and roots of alfalfa. B, Total RNA from roots of alfalfa (ALF), white clover (WC), sweetclover (SC), red clover (RC), and birdsfoot trefoil (BFT) at the time of flowering. Northern blots were hybridized with the 32P-labeled pMSBA1 β-amylase insert.
