Wiktionary
transmembrane
a. 1 (context biology English) traversing a cellular membrane 2 of or pertaining to a transmembrane protein or segment n. (context cytology English) a transmembrane protein, or the transmembrane portion of a protein
Usage examples of "transmembrane".
Again this traces to mutations of a gene coding for a transmembrane protein, this time consisting of 1,480 amino acids and regulating chloride ion transport into the cell.