All
 D12 Amino Acids, Peptides, and Proteins D000602 +
 D12.776 Proteins D011506 +
 D12.776.543 Membrane Proteins D008565 +
 D12.776.543.750 Receptors, Cell Surface D011956 +
 D12.776.543.750.720 Receptors, Neurotransmitter D017981 +
 D12.776.543.750.720.700 Receptors, Purinergic D011983 +
 D12.776.543.750.720.700.700 Receptors, Purinergic P1 D018047 +
 D12.776.543.750.720.700.700.200 Receptors, Adenosine A2 D043683 +
 D12.776.543.750.720.700.700.200.200 Receptor, Adenosine A2B D043704 
 D12.776.543.750.720.700.700.200.100 Receptor, Adenosine A2A D043705