About: http://webisa.webdatacommons.org/215474409

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Nucleotides, such as ATP, ADP, UTP and UDP, and a variety of di-adenosine polyphosphates act as extra-cellular signalling substances in virtually all tissues.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov