5M6Q:
reference: Discovery of a microbial transglutaminase enabling highly site-specific labeling of proteins., Steffen W, Ko FC, Patel J, Lyamichev V, Albert TJ, Benz J, Rudolph MG, Bergmann F, Streidl T, Kratzsch P, Boenitz-Dulat M, Oelschlaegel T, Schraeml M, J Biol Chem. 2017 Sep 22;292(38):15622-15635. doi: 10.1074/jbc.M117.797811. Epub , 2017 Jul 27. PMID: 28751378

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