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Constitutive mRNA levels of JIP21 in different tissues (roots, stem, leaves, flowers, and fruits) of tomato, as analyzed by RT-PCR. mRNA from tomato leaves harvested 24 h after a 2 mm MeJ treatment is included as a positive control. Top, PCR performed with specific JIP21 primers. Bottom, PCR performed with specific primers of the RPL2 gene (Fleming et al., 1993) used as a control for RT.
