| Ubiquitous calcineurin B homologous protein ( CHP or p 22 ) is co localized and co immunoprecipitated with expressed NHE 1 , NHE 2 , or NHE 3 independently of its myristoylation and Ca2+ binding , and its binding site was identified as the juxtamembrane region within the carboxyl terminal cytoplasmic domain of exchangers . ^^^ |