Fig. 3

Identity comparison of the N-terminal portion of PROPEP amino acid sequences (i.e. omitting the Pep sequences) in 95 Rosaceae varieties. Heat map showing pairwise comparison of all 180 N-terminal PROPEP sequences. Colors indicate increasing identity (%) from high (red), through white, to low (blue). The position of N-terminal PROPEP1, PROPEP2, PROPEP3 and PROPEP4 sequences is indicated (top and left). Bootstrapped neighbor-joining tree of N-terminal PROPEP amino acid sequences, constructed using the CLC tool (left). A higher-resolution image of the tree is given in Additional file 6