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Phylogenetic tree and expression pattern of PINs in maize.
(a) Phylogenetic tree of PINs in maize, rice and Arabidopsis. The red highlights the PIN family genes in maize. The ID numbers of the genes are listed in Table S1. (b) Real-time RT-PCR analysis of maize PIN family genes in different maize tissues and at developmental stages with maize Actin1 (NM_001155179.1) used as an internal control to normalize the relative expression levels.
