4TVY:
reference: Computational design of a red fluorophore ligase for site-specific protein labeling in living cells., Liu DS, Nivon LG, Richter F, Goldman PJ, Deerinck TJ, Yao JZ, Richardson D, Phipps WS, Ye AZ, Ellisman MH, Drennan CL, Baker D, Ting AY, Proc Natl Acad Sci U S A. 2014 Oct 13. pii: 201404736. PMID: 25313043

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