| Antibodies | 
 
 | 
| Mouse monoclonal anti-FLAG M2 Alkaline Phosphatase | 
Sigma-Aldrich | 
Cat#A9469; RRID: AB_439699 | 
 
 | 
| Bacterial and virus strains | 
 
 | 
| 
E. coli BL21-CodonPlus (DE3)-RIL (chemocompetent) | 
Agilent | 
Cat#230245 | 
 
 | 
| Chemicals, peptides, and recombinant proteins | 
 
 | 
| Pmel | 
NEB | 
Cat#R0560L | 
| Yeast nitrogen base (YNB) without amino acids and ammonium sulfate | 
Sigma-Aldrich | 
Cat#Y1251 | 
| 
15N-labeled ammonium sulfate | 
CIL | 
Cat#NLM-713-50 | 
| Deuterium oxide (2H2O) | 
CIL | 
Cat#DLM-4-99.8 | 
| Theophylline | 
Sigma-Aldrich | 
Cat# T1633 | 
| Terrific Broth (TB) | 
RPI | 
Cat#T15000–1000.0 | 
| Biotin | 
Sigma-Aldrich | 
Cat#B4639 | 
| lodoacetamide | 
Sigma-Aldrich | 
Cat#I1149 | 
| Lauryl maltose neopentyl glycol (LMNG) | 
Anatrace | 
Cat#NG310 | 
| Cholesteryl hemisuccinate (CHS) | 
Anatrace | 
Cat#CH210 | 
| Adenosine 5’-triphosphate (ATP) | 
Sigma-Aldrich | 
Cat#A2383 | 
| ZM241385: 4-(2-[7-Amino-2-(2-furyl)[1,2,4]triazolo[2,3-a] [1,3,5]triazin-5-ylamino]ethyl)phenol | 
Tocris | 
Cat#1036 | 
| NECA: 5’-N-ethylcarboxamidoadenosine | 
Tocris | 
Cat#1691 | 
| Guanosine 5’-diphosphate (GDP) | 
Sigma-Aldrich | 
Cat#G7127 | 
| Apyrase | 
NEB | 
Cat#M0398S | 
 
 | 
| Experimental models: Organisms/strains | 
 
 | 
| 
P. pastoris BG12 (electrocompetent) | 
BioGrammatics | 
Cat#PS004-01 | 
 
 | 
| Recombinant DNA | 
 
 | 
| pPIC9K-A2AAR | 
Eddy et al., 201836
 | 
N/A | 
| pPIC9K-A2AAR-W2466.48F | 
Eddy et al., 201836
 | 
N/A | 
| pET15b-Mini-Gs | 
Carpenter et al., 201630
 | 
N/A | 
 
 | 
| Software and algorithms | 
 
 | 
| Topspin version 3.6.3 | 
Bruker | 
https://www.bruker.com/en/products-and-solutions/mr/nmr-software.html
 | 
 
 | 
| Other | 
 
 | 
| TALON resin | 
Clontech | 
Cat#635504 | 
| Ni-NTA resin | 
ThermoFisher | 
Cat# 88222 | 
| His-Trap HP NiNTA 5 mL column | 
Cytiva | 
Cat#17524802 | 
| PD-10 | 
Cytiva | 
Cat#17085101 | 
| PD MiniTrap G25 column | 
Cytiva | 
Cat#28918007 | 
| HiPrep 26/10 column | 
Cytiva | 
Cat#17508701 | 
| HiLoad Superdex 75 column | 
Cytiva | 
Cat#90100805 | 
| Increase Superdex 200 10/300 GL column | 
Cytiva | 
Cat#28990944 |