Yingping, F. Lemeille, S. González, A. Risoul, V. Denis, Y. Richaud, P. Lamrabet, O. Fillat, M.F. Zhang, C.C Latifi, A. The Pkn22 Ser/Thr kinase in Nostoc PCC 7120: Role of FurA and NtcA regulators and transcript profiling under nitrogen starvation and oxidative stress BMC genomics 10.1186/s12864-015-1703-1 2015 2015