>1R22_1|Chains A, B|Transcriptional repressor smtB|Synechococcus elongatus PCC 7942 (1140) MTKPVLQDGETVVSQGTHAAIASELQAIAPEVAQSLAEFFAVLADPNRLRLLSLLARSELSVGDLAQAIGVSESAVSHQLRSLRNLRLVSYRKQGRHVYYQLQDHHIVALYQNALDHLQESR