Once released, BNP binds to and activates the atrial natriuretic factor receptor NPRA, and to a lesser extent NPRB, in a fashion similar to atrial natriuretic peptide (ANP) but with 10-fold lower affinity.
The GTP layer for the control plane (GTP-C) tunnels signaling messages between GSNs in the GPRS backbone network.The GTP-C enables several procedures to be performed through the GPRS backbone network, including path management, tunnel management, location management, and mobility management.he GTP layer for the control plane (GTP-C) tunnels signaling messages between GSNs in the GPRS backbone network.
signaling, sign. 1  communication - something that is communicated by or to or between people or groups. 2  recording - a signal that encodes something (e.g., picture or sound) that has been recorded. 3  phone number, telephone number, number - the number is used in calling a particular telephone; he has an unlisted number.