3ZEV:
reference: Structure of signaling-competent neurotensin receptor 1 obtained by directed evolution in Escherichia coli., Egloff P, Hillenbrand M, Klenk C, Batyuk A, Heine P, Balada S, Schlinkmann KM, Scott DJ, Schutz M, Pluckthun A, Proc Natl Acad Sci U S A. 2014 Jan 22. PMID: 24453215

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