The gene exon/intron structure was analyzed using the Gene Structure Display Server (GSDS) [39] by comparing the cDNAs with their corresponding genomic DNA sequences. The Multiple Em for Motif Elicitation (MEME; version 4.11.2) program was used to analyze the protein sequences of the four cotton species G. raimondii, G. arboreum, G. hirsutum, and G. barbadense designated GrSAURs, GaSAURs, GhSAURs, and GbSAURs, respectively. The following parameter settings were used: size distribution, zero or one occurrence per sequence; motifs count, 5; and motif width, between 6 and 37 wide.
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