From: The SarcoEndoplasmic Reticulum Calcium ATPase (SERCA) pump: a potential target for intervention in aging and skeletal muscle pathologies
Cell type
SERCA isoforms
Skeletal muscle
 Fast twitch
SERCA 1a, 1b*, 2a, 2b (*fetal only)
 Slow twitch
SERCA 2a, 2b
Cardiac muscle
Non-muscle cells
SERCA 2b, 3a, 3b, 3c