About: http://webisa.webdatacommons.org/54748755

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	While it was estimated in 1968 that magnesium was a required cofactor for over 300 enzyme systems, that number is now more reliably estimated at 700 to 800.
http://www.w3.org/ns/prov#wasQuotedFrom	prohealth.com