Doors 32 Documentation. Our longstanding and much loved Doors32 Software is now available only via download from Keri's web site or special order, but is still free of charge. It will continue to be available as long as customers ask for it and computers with compatible operating systems exist.
Cell biology The reduction of a cellâs response to a hormone or other ligand by internalizing its cognate receptor and degrading it within a coated pit; downregulation is a mechanism by which receptors respond to an excess of ligands.
Muscarinic acetylcholine receptors, or mAChRs, are acetylcholine receptors that form G protein-receptor complexes in the cell membranes of certain neurons and other cells.heir counterparts are nicotinic acetylcholine receptors (nAChRs), receptor ion channels that are also important in the autonomic nervous system.