1X9J | A:1-172; E:1-172; E:173-371; F:1-172; F:173-372; G:1-172; G:173-373; H:1-172; H:173-372; A:173-373; B:1-172; B:173-371; C:1-172; C:173-371; D:1-172; D:173-373 | STRUCTURE OF BUTYRATE KINASE 2 REVEALS BOTH OPEN- AND CITRATE-INDUCED CLOSED CONFORMATIONS: IMPLICATIONS FOR SUBSTRATE-INDUCED FIT CONFORMATIONAL CHANGES |