The GH19 chitinase family. The tree includes GH19 proteins from five species: Arabidopsis (AT), rice, Brachypodium (Bradi), sorghum, and poplar. Tree construction is as in Figure 2. Sequences from eudicots are indicated in blue (Arabidopsis with filled triangles, poplar with open triangles); sequences from grasses are indicated in red (Brachypodium with filled circles, rice and sorghum with open circles). For clarity, gene names or accession numbers are shown only for Arabidopsis and Brachypodium. Chitinase class designations are listed by each clade and are indicated next each of the Arabidopsis and Brachypodium proteins. For complete branch labels and bootstrap values, see additional file 12.