Table 1. Several cofactors contain both nucleotide and amino acid characteristics^a.

Cofactors	Full name	Descriptiona
CoA	Coenzyme A	ADP-pantothenylcysteamine
FAD	Flavin-adenine dinucleotide	Linked to lysine of proteins
FMN	Riboflavin-5′-phosphate	Linked to cysteine of proteins
SAM	S-adenosyl methionine	S-Adenosylmethionine
Factor 420	8-hydroxy-5-deazaflavin	Flavinoid-linked (Glu)2
F390-A	Adenosine 5′-phosphate	Flavinoid-linked (Glu)2
F390-G	Guanosine 5′- phosphate	Flavinoid-linked (Glu)2

^aMost of the observations were taken from [30]–[32].