KV1.5 is a mammalian voltage-dependent K+ channel, homologous to the Drosophila Shaker K+ channel. KV1.5 was first cloned from rat brain1. Eight Shaker related genes exist in mammals constituting the KV1, subfamily of the large KV channel family of genes.The structure of KV1.5 channel is similar to all KV channels and includes six membrane spanning helixes creating a voltage sensor domain and a pore domain