Table 1. Data snapshot of ING proteins utilized in the study.

The crystal structures of the ING proteins were gathered from the protein database (http://www.rcsb.org/).

Protein/Domain name	PDB ID	Sequence length	Resolution	Model	Ref.
ING1 PHD finger (human)	2QIC	62	2.10 Å	X-RAY Diff.	Papamokos (2019)
ING2 PHD finger (mouse)	2G6Q	62	2.00 Å	X-RAY Diff	Ikebe, Sakuraba & Kono (2016)
ING4 PHD finger (human)	2VNF	60	1.76 Å	X-RAY Diff.	Pettersen et al. (2004)
ING5 PHD finger (human)	3C6W	59	1.75 Å	X-RAY Diff.	Waterhouse et al. (2009)