. 2016 Nov 17;17:470. doi: 10.1186/s12859-016-1348-3

Table 1.

Composition of the dataset for the 9 types of ligands

Ligand Categories	Ligand ID^a	No. Proteins	No. Positive^b	No. Negative^c
Metal ions	CU	110	535	38488
	FE	227	1115	73813
	FE2	103	439	34113
	ZN	933	4317	367292
Acid radical ions	SO4	303	2125	99729
Acid radical ions	PO4	339	2168	112279
Nucleotides	ATP	261	3631	100848
Nucleotides	FMN	95	1552	30244
HEME	HEM and HEC	228	5821	69155

^aThe ligand ID in the BioLip database

^bThe number of binding residues

^cThe number of non-binding residues