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Maximum-likelihood dendrogram based on protein sequences of candidate sensory neuron membrane proteins (SNMPs). Included are SNMPs from Ips typographus (Ityp), Dendroctonus ponderosae (Dpon), Tribolium castaneum (Tcas) and Drosophila melanogaster (Dmel). The T. castaneum orthologue of Croqemort, a non-SNMP member of the CD36 family, was used as outgroup to root the tree. Numbers refer to support values, which are only displayed when <; 0.9.
