NOT KNOWN FACTUAL STATEMENTS ABOUT PKRRATING

3B). R526 from the loop among αJ and αI anchors the C-terminal portion of the activation loop by forming a salt bridge with E458 at The bottom of αEF. Q459 stabilizes the HRD motif by a hydrogen bond to the main chain carbonyl of R413. The tip with the activation phase is stabilized by a hydrogen bond among Y454 and E480 from αfile. In the FTF