Immunogen sequence: KRRYSKGGAC RGLGDDHRPE DRGFGVQRLR SKAQNKENFR PASSAEPAVQ KLASLRLGGA EPRLLRWDLT F. Junctional complexes between the plasma membrane (PM) and endoplasmic/sarcoplasmic reticulum (ER/SR) are a common feature of all excitable cell types and