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Expression of PtrLAC genes in tissues of P. trichocarpa. Fold changes of transcript levels in young leaves (L1), mature leaves (L2), young stems (S), SDX (X), phloem (P), and young roots (R) are shown. Transcript levels in young leaves were arbitrarily set to 1, except PtrLAC13, PtrLAC18, PtrLAC26, and PtrLAC37, whose levels in young roots were set to 1.
