passages.id: split_1_test_2151_passage
passages.type: progene_text
passages.text: We conclude that while KCNN4 contributes to Ca2+ - activated anion secretion by Calu-3 cells , basal and cAMP - activated secretion are more critically dependent on other K + channel types , possibly involving one or more class of KCNQ1 - containing channel complexes .