Table 1. Summary of the dataset.

S.No	SCOP ID	Family Name	Total members	Representative member
Family 1	c.2.1.1-	Alcohol dehydrogenase-like C-terminal domain	11	1P0F
Family 2	c.2.1.2-	Tyrosine dependent oxidoreductases	13	1OOE
Family 3	c.2.1.3-	Glyceraldehyde-3 phosphate dehydrogenase-like N-terminal domain	17	1Q0Q
Family 4	c.2.1.4-	Formate/Glycerate dehydrogenases,NAD-domain	5	1PJC
Family 5	c.2.1.5-	LDH N-terminal domain like	13	1LLD
Family 6	c.2.1.6-	6-Phosphogluconate dehydrogenase-like N-terminal domain	13	2F1K
Family 7	c.2.1.7-	Aminoacid dehydrogenase-like,C-terminal domain	7	1GPJ
Family 8	c.2.1.9-	Potassium channel NAD-binding domain	5	1LSS