Ap4A

Ap4A
Names
	IUPAC name O1,O7-Di(5′-deoxyadenosin-5′-yl) tetrahydrogen tetraphosphate
	Systematic IUPAC name O1,O7-Bis{[(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl} tetrahydrogen tetraphosphate
	Other names Diadenosine tetraphosphate; 5',5'''-Diadenosine tetraphosphate; AppppA
Identifiers
CAS Number	5542-28-9;
3D model (JSmol)	Interactive image;
PubChem CID	21706;
	SMILES C1=NC2=C(C(=N1)N)N=CN2[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O)OP(=O)(O)OP(=O)(O)OP(=O)(O)OC[C@@H]4[C@H]([C@H]([C@@H](O4)N5C=NC6=C5N=CN=C6N)O)O)O)O;
Properties
Chemical formula	C20H28N10O19P4
Molar mass	836.390 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Diadenosine tetraphosphate or Ap4A is a putative alarmone, ubiquitous in nature being common to everything from bacteria to humans. It is made up of two adenosines joined together by a 5′-5′ linked chain of four phosphates. Adenosine polyphosphates are capable of inducing multiple physiological effects.

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