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. 2015 Oct 29;10(10):e0141712. doi: 10.1371/journal.pone.0141712

Fig 8. Distribution of Methionine, Histidine and Tryptophan in Adrenergic, Amine, OR, TAAR receptors.

Fig 8

(A) Distribution of histidine residues; (B) Distribution of methionine residues; and (C) Distribution of tryptophan residues in Adrenergic, Amine, Odorant, and Trace amine-associted receptors. The frequency of occurrence is displayed from NxS/T to NPxxY conserved motifs, however the graphs are all anchored by the Ct NPxxY motif. Three histidine and five methionine residues are found at discrete regions in ORs compared all other receptor types (blue and black asterisks); See Fig 3 for exact position. Tryptophan residues are nearly abolished in ORs with only one conserved position (red asterisk), but distributions are conserved between TAARs and Adrenergic receptors.