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. 2018 Oct;367(1):101–107. doi: 10.1124/jpet.118.250852

TABLE 4.

Coupling efficiencies for ligands at various primate OTRs

OTR Potency/Affinity Ratio −Log(Ca2+ IC50/Ki)
Pro8-OT Leu8-OT AVP
Human 2.51 2.75 2.80
Macaque 1.51 1.57 1.77
Marmoset 2.85 3.00 3.38
Titi monkey 2.39 2.95 2.60