Gerhardt, E. C.; Moure, V. R.; Souza, A. W.; Pedrosa, F. O.; Souza, E. M.; Diacovich, L.; Gramajo, H.; Huergo, L. F. Expression and Purification of Untagged GlnK Proteins from Actinobacteria . EXCLI J. 2017, 16, 949-958.