Table 1.

BK_Ca channel splice variants expressed in the myometrium.

Splice variant name	Affected domain	Number of amino acids added	Functional modification	References
mK44	S0-S1 loop	44	decreased voltage and Ca2+ sensitivity, endoprotease cleavage	Korovkina et al., 2001, 2006; Curley et al., 2004
SV1	S1	33	endoplasmic reticulum retention	Zarei et al., 2001, 2004
STREX	S8-S9 loop	59	increased voltage and Ca2+ sensitivity, switches from PKA activation to inhibition	Saito et al., 1997; Benkusky et al., 2000; Tian et al., 2001; Zhu et al., 2005