We are interested in learning how small molecules in the blood stream can cause cells to react in specific ways, such as growing, dividing or migrating. While there are many agents that can stimulate or inhibit cell behavior, we are most interested in the ability of certain hormones and neurotransmitters to activate a family of proteins called "G Proteins". G proteins can simulate an enzyme called phospholipase Cbeta (PLCbeta). Activation of PLCbeta raises the level of calcium in the cell, which changes the activity of many other proteins. Additionally, PLCbeta can also affect the ability of a cell to control the transcription of specific genes into proteins by changing the stability of their messenger RNA.