Inositol trisphosphate (ip3) is a signaling molecule derived from the phospholipid phosphatidylinositol 4,5-bisphosphate (PIP2), which plays a crucial role in cellular signal transduction pathways. It is primarily involved in the regulation of calcium ion release from the endoplasmic reticulum, leading to various cellular responses. ip3 acts as a second messenger, conveying signals from hormones and other extracellular stimuli to trigger intracellular processes essential for cell function and communication.
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