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Presence of mRNAs for 18S, Rubisco small and large subunit (RbcS and RbcL), ubiquitin-conjugating enzyme (UBC), and PCC1 (pathogen and circadian controlled) in samples from leaf (L), petiole (P), and phloem exudates (Ph) as determined by RT-PCR. The picture shows a representative of three independent biological replicates.
