Fig. 7

Characterization of lettuce heat shock protein 90 (LsHsp90) and heat shock protein 100 (LsHsp100) gene families. a Phylogenetic tree of Hsp90 proteins of L. sativa and A. thaliana. Lettuce Hsp proteins are marked in bold. b Gene structure and motif composition analysis of LsHsp90. c Phylogenetic analysis of Hsp100 proteins of L. sativa and A. thaliana. d Gene structure and motif composition analysis of LsHsp100. a, c Nomenclature of LsHsp90 and LsHsp100 genes were assigned according to the name of A. thaliana homologues. Lettuce Hsp90 and Hsp100 family members are represented in different colors according to their subfamily (Group Ia, Ib, IIa, and IIb in Hsp90ClpB-Cyt, ClpB-MT, ClpB-CP, ClpC, and ClpD in Hsp100. c, d Exon-intron organization. Blue boxes, green boxes, and black lines indicate untranslated region (UTR), coding sequence (CDS), and intron, respectively. The numbers on each intron represent the intron phase (0, 1, or 2). Phylogenetic analysis was generated by the Maximum Likelihood method. Numbers at the nodes represent percent of bootstrap values based on 500 replications. Detailed information of all motifs is shown in Additional file 4: Table S4