PRRT2 and hydrops fetalis: To test further the role of PKCα‐phosphorylation in [Zn2+]i increase in mammalian HF, we measured [Zn2+]i level in both control and doxorubicin‐treated cells with and without a total PKC inhibitor (IPKC; 0.1 μM for 24 hrs incubation).