Researchers incubated J3’s in the absence of Unknown Factor X. Upon the addition of a membrane-permeant cGMP agonist (a cGMP agonist able to penetrate into the J3’s) you would expect to see STIMULATION/INHIBITION (highlight one) of the J3 activation pathway. 2. Researchers incubated J3’s in the presence of Unknown Factor X, but with the addition of a membrane-permeant CYP antagonist. In this case, you would expect to see STIMULATION/INHIBITION (highlight one) of the J3 activation pathway.

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.