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. 2020 Oct 17;117(10):2175–2185. doi: 10.1093/cvr/cvaa290

Figure 2.

Figure 2

Subcellular organization of SPEG and its phosphorylation targets in cardiac muscle. SPEG phosphorylation of junctophilin-2 (JPH2) in cardiac muscle plays a role in T-tubule formation and stabilization. SPEG phosphorylation of RyR2 and SERCA2a in cardiac muscle modulates sarcoplasmic reticulum Ca2+ handling.