Roles of four conserved basic amino acids in a ferredoxin-dependent cyanobacterial nitrate reductase

Anurag P. Srivastava, Masakazu Hirasawa, Megha Bhalla, Jung Sung Chung, James Allen, Michael K. Johnson, Jatindra N. Tripathy, Luis M. Rubio, Brian Vaccaro, Sowmya Subramanian, Enrique Flores, Masoud Zabet-Moghaddam, Kyle Stitle, David B. Knaff