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Second messenger, molecule inside cells that acts to transmit signals from a receptor to a target. The term second messenger was coined upon the discovery of these substances in order to distinguish them from hormones and other molecules that function outside the cell as “first messengers” in the transmission of biological information. Many second messenger molecules are small and Messengers in the sidebar: WhatsApp, Facebook Messenger Stay focused. The best part about having Facebook messenger, WhatsApp, Telegram, and VK in Opera, is that you don’t have to switch back and forth between different apps, … Second messenger system - Wikipedia
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May 19, 2020 · WhatsApp Messenger is a free, multifunction, multiplatform messaging app and one of the most popular call and chat apps available. We give you the lowdown. WhatsApp Messenger is the number one cross-platform mobile messaging app for iPhone, BlackBerry, Android, Windows Phone and Nokia. WhatsApp app allows you to exchange messages without having to pay for SMS.
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