Soman muscarinic receptor binding

It was shown that tabun, sarin, soman, and VX bind to the muscarinic receptor subtype m2, leading to the assumption... 

The toxicity of nerve agents may include direct action on nicotinic as well as muscarinic ACh receptors when their concentration in circulation rises above micromolar levels. At nanomolar levels, their toxicity is the result mainly of their inhibition of AChE. However, at these low concentrations, many OP agents (e.g., soman and VX) may directly affect a small population of muscarinic ACh receptors that have a high affinity for [ H]-cis-methyldioxalane binding. Aas ° demonstrated... 

---