Contact: Kristin Elise Phillips
American Museum of Natural History
Caption: Supramap depicts the westward spread of avian influenza (H5N1). Red tree branches indicate a genotype of lysine (K) at amino acid position 627 in the PB2 protein which confers increase replication in mammals. White tree branches indicate a genotype of glutamic acid (E), the wild type for H5N1. Mutations at each node can be viewed in pop-up windows.
Credit: Janies et al. 2010 Cladistics online 04-9-10
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