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(a) Exon and intron composition of PeMKK2a and PtMKKs. (The * represents the MKK2 gene cloned from “Nanlin 895”). (b) Multiple alignment of amino acid sequences of MKK2 proteins in different plant species. The black background indicates conserved regions, and the red background indicates specific conserved structural domains. (Here, only part of the sequence is shown.) (c) Nucleotide and deduced amino acid sequences of PeMKK2a.
