Y4 Receptor in Different Species: Functional Expression and Binding
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The Y4-receptor subtype shows high species diversity compared with the Y1-, Y2-, and Y5-receptor subtypes. The rodent Y4 receptor
differs considerably in sequence, pharmacology, and distribution from the human Y4 receptor. To characterize further the intriguing
species differences of the Y4 receptor, we have also cloned the Y4 receptor from the guinea pig, which is evolutionarily nearly
equidistant from both primates and rodents.