3′,5′ cGMP	3′,5′ cyclic guanosine monophosphate
3′,5′ cGMP-H	free adic form of 3′,5′ cyclic guanosine monophosphate
3′,5′ cAMP	3′,5′ cyclic adenosine monophosphate
3′,5′ cCMP	3′,5′ cyclic cytosine monophosphate
5′ AMP	adenosine 5′ monophosphate
3′,5′ cNMP	3′,5′ cyclic nucleotide
nt	nucleotide
pG	5′ guanylic acid
pGpG	5′ diguanylic acid
pGp	5′ guanylic acid 3′ phosphate
pC	5′ cytidylic acid
pCpC	5′ dicytidylic acid
pCp	5′ cytidylic acid 3′ phosphate
DBU	1,8-diazabicyclo(5.4.0)undec-7-ene
MALDI	matrix-assisted laser desorption/ionization
ToF	time of flight
ESI	electrospray ionization
MS	mass spectrometry
HPLC	high-performance liquid chromatography