Fig. 2From: Genome-wide characterization and expression profiling of MAPK cascade genes in Salvia miltiorrhiza reveals the function of SmMAPK3 and SmMAPK1 in secondary metabolismThe intron/exon structure of the SmMAPK gene family members. a MAPK sequences, b MAPKK sequences, c MAPKKKK sequences, and d MAPKKK sequences. Exons are shown as yellow boxes and introns with a simple line. Untranslated regions are indicated by thick blue lines. 0, 1, and 2 represent the intron phase. Gene models are drawn to scaleBack to article page