Table 1.

BK auxiliary subunits in glomerulus.

Subunit	Gene symbol	Tissue (s)	Functional effect
β1	KCNMB1	Mesangial cell; rat podocyte	Facilitates voltage-sensor activation; IbTX insensitive; ChTX sensitive (Ma et al., 2005; Piwkowska et al., 2015)
β2	KCNMB2	Rat podocyte	Inactivation; IbTX sensitive; ChTX insensitive (Piwkowska et al., 2015)
β3	KCNMB3	Human podocyte	Inactivation; IbTX sensitive; ChTX insensitive (Morton et al., 2004)
β4	KCNMB4	Rat and human podocyte	Facilitates voltage-sensor activation; IbTX insensitive; ChTX insensitive; MarTX sensitive (Morton et al., 2004; Kim et al., 2008; Piwkowska et al., 2015)
γ1	LRRC26	Arterial smooth muscle cell	Facilitates voltage-sensor activation; IbTX sensitive (Contreras et al., 2013)
γ2	LRRC52	Kidney	Facilitates voltage-sensor activation (Contreras et al., 2013)
γ3	LRRC55	Not reported	Facilitates voltage-sensor activation (Contreras et al., 2013)
γ4	LRRC38	Not reported	Facilitates voltage-sensor activation (Contreras et al., 2013)