定額
Activation of the T-cell receptor (violet, lef) through the presentation of an antigen molecule (green) by MHC -2 (red). A G-alpha subunit of a G-protein (blue) gets then activated through GTP (yellow) binding and activates the adenylyl cylclase (violet, right), which produces c-AMP (red, highlighted) out of ATP. Source: PDB entries 1jl4, 1fyt, 6r3q .の素材 [FY310170315922]
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