Question

1. which amino acid residues contribute most to coomassie dye binding?

Explanation:

Coomassie dye binds to proteins. Arginine and lysine are positively - charged amino acids. The Coomassie dye (which has a negative charge) forms electrostatic interactions with these positively - charged amino acid residues (arginine and lysine), and these interactions are a major contributor to Coomassie dye binding.

Answer:

Arginine and lysine.