Figure 2.

Phylogenetic tree of protein sequences for Zea m 1 and other grass group 1 pollen allergens. The tree was constructed by neighbor joining and rooted using a maize vegetative β-expansin as the out group; bootstrap values are shown at each node, and GenBank Accession numbers are indicated after the genus name. For maize and rice, the expansin gene designations are also given, e.g. EXPB1. The sorghum sequence is from Knox and Suphioglu (1996b) and is not in GenBank. The Triticum and Hordeum sequences are based on EST assemblies (http://www.plantgdb.org/cgi-bin/PlantGDBblast), and the assembly number is given.