Regulates arginine biosynthesis genes (By similarity). ARGR_BIFLO MSETGPSLQRPATRAARLSAIEQALATHIITSQSQLSKILIDEGIAVTQATLSRDLDEMHAVKTRLKDGTVAYTVGRSVVASEGEDVGERGEAQMSRVLNGLVTSVAAAGNLVVVHTPSGAAQYVASVIDKQPIEGVLGTIAGDDTVMVICTNDDTAVFRSDWLLSLASK 170 Arginine repressor BL1059 argR