Table 3.

Affinity of adenine for the tagged and the untagged wt and N-terminal deletion mutant of the rat adenine receptor determined by radioligand binding versus [³H]adenine (10 nM)

	Adenine
	IC50 ± SEM (nM)	Numbera	pb
rAdeR	236 ± 35	7
myc-rAdeR	211 ± 11	3	ns
rAdeRΔN	391 ± 100	5	ns
myc-rAdeRΔN	340 ± 60	4	ns

ns not significant

p > 0.05

^aNumber of experiments performed in triplicates

^bLevel of significance in comparison to the data of the wt receptor