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. 2023 May 31;13(6):915. doi: 10.3390/biom13060915

Figure 3.

Figure 3

Activation mechanisms of PLC. PLCβ isozymes are activated by Gαq, Gβγ, and Rac. PLCγ isoforms are activated by RTKs. PLCδ activity can be stimulated by Ca2+ within the physiological range through the activation of the other PLC isozymes or influx of Ca2+ through calcium channels. PLCε can be activated by GPCRs and RTKs as well as by small GTPases. PLCζ and PLCη are highly sensitive to Ca2+ and respond to small elevations in intracellular Ca2+ levels. PLCη is also activated by GPCR.