Name	Info	Provider	Link
tpx	free resource	BioCyc	https://biocyc.org/gene?orgid=GCF_000013425&id=G1I0R-1694
	subscription/membership/fee required	International Union of Crystallography	http://scripts.iucr.org/cgi-bin/paper?S1744309109037580
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19923729/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/19923729