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.
The Message info screen shows: 1  Delivered when your message is delivered to your recipient's phone, but the recipient has not yet seen it. 2  Read or Seen when the recipient has read your message or seen your picture, audio file, or video. 3  For a Voice Message, the recipient has seen but has not yet played it.he Message info screen shows: 1  Delivered when your message is delivered to your recipient's phone, but the recipient has not yet seen it. 2  Read or Seen when the recipient has read your message or seen your picture, audio file, or video. 3  Played when the recipient has played your Voice Message.