Complex sentence: Am example of cAMP's function is the postive regulation of the lac operon, in low glucose concenration, cAMP accumluates, it binds to the allosteric site on CRP, a transcription activator protein.
Split into simpler sentences: Am example of cAMP's function is the postive regulation of the lac operon. In low glucose concenration, cAMP accumluates, it binds to the allosteric site on CRP, a transcription activator protein.