sequence of Kv4.2 KCND2_MOUSE IMR:0701335 Kcnd2 Kiaa1044 Kv4.2 Potassium voltage-gated channel subfamily D member 2 UniProt:Q9Z0V2 Voltage-gated potassium channel subunit Kv4.2 molecule_role potassium voltage-gated channel, Shal-related family, member 2