Plasmids 101: Protein tags
Type
Blog Post
....
Arguably the simplest affinity tag is the polyhistidine (His) tag. Small and unlikely to affect function...the tag size quickly – modifying the length a polyhistidine tract does not greatly alter the size of the...used for purification as elution requires low pH
poly His
HHHHHH
0.8
Affinity and Purification
Very small...Solubility and Affinity
Abundance of charged and polar residues improves solubility; good for antibody-...