The apical membranes of the dark cells also have a K+ channel which is formed of two subunits , the KCNE1 regulatory protein and the KCNQ1 channel proteins .
DET ADJ NOUN ADP DET ADJ NOUN ADV VERB DET PROPN NOUN DET AUX VERB ADP NUM NOUN , DET PROPN ADJ NOUN CCONJ DET PROPN NOUN NOUN .