<prompt> Structurally the connexons are:HexamersPentamersTetramersTrimeric proteins  <response>: A connexon is composed of six integral membrane proteinHexamers, having subunits called connexins. Ligand-gated ion channels are made up of pentameric proteins. Voltage-gated ion channels are made up of tetrameric proteins. G-protein, ENaC are the examples of trimeric proteins. 