Calreticulins, such as CALR3, are Ca(2+)-binding chaperones localized mainly in the endoplasmic/sarcoplasmic reticulum.Calreticulins, such as CALR3, are Ca(2+)-binding chaperones localized mainly in the endoplasmic/sarcoplasmic reticulum Persson et al. (2002) [PubMed 12384296].[supplied by OMIM]. PRIMARYREFSEQ_SPAN PRIMARY_IDENTIFIER PRIMARY_SPAN COMP 1-4 BC014595.2 1-4 5-443 DB459545.1 7-445 444-528 BP370084.1 424-508 529-1034 BC014595.2 529-1034 1035-1035 AC008764.9 27895-27895 c 1036-1273 BC014595.2 1036-1273 1274-1285 DB510196.1 313-324