Figure 1From: Arginine-to-lysine substitutions influence recombinant horseradish peroxidase stability and immobilisation effectivenessThe twenty-one arginine residues in HRP. Those shown in black are the three (R118, R159, R283) selected for mutation to lysine, to enable orientated rHRP immobilisation. The arrow indicates the active site entrance, whilst the substituted lysine residues are also highlighted (232, Ψ; 241, *)Back to article page