on the other hand , computer simulation of biphasic curves ( adenylate cyclase inhibition in the presence of activation via a stimulatory receptor ) indicates that the failure to observe an a1-adenosine receptor-mediated inhibition of adenylate cyclase activity in the presence of stimulatory adenosine receptors may be attributable to methodological constraints .
C0001451
a1-adenosine receptor
C0001471
adenosine receptors