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Steady-state levels of alternative transcripts for the LjNTRA and LjNTRB genes in roots, nodules, and leaves. Semiquantitative RT-PCR analysis was carried out using gene-specific primers (Supplemental Table S1). One pair of primers amplified exclusively the long cDNA (L), and the second pair amplified both long and short cDNAs (LS). Numbers of base pairs are given on the right.
