The figure lists the expression and activation status of key neurotransmitter receptors (including nAChR subtypes α1, α5, α7, α9, mAChR2/3, GABAA, GABAB, D1 and D2 dopamine receptors, β - AR, 5-HT1/2/3/7, mGluR1/2/3) in tumor tissues. This evidence concerns the gene GRM1 and neoplasm.