Fig. 6
From: Cell cycle control and environmental response by second messengers in Caulobacter crescentus
Schematic diagram of EI Ntr structure and phosphate transfer. The C-terminus of EI Ntr bears a PEP-binding domain (PBD) and the N-terminus is responsible for binding NPr (NBD). The red dashed arrows indicate the direction of phosphate transfer. The separate GAF domain senses nitrogen availability by binding glutamine, which inhibits phosphoryl group transferred from PEP to EI Ntr