1.3.7.4	D116N	mutant still retains the ability of substrate binding, but with only 1.5% relative activity of wild type protein	687760	
1.3.7.4	D123N	site-directed mutagenesis, the mutated enzyme retains biliverdin IXalpha binding activity and radical formation activity, whereas the PPhiB formation activity is negligible	763272	
1.3.7.4	D146N	mutant completely loses catalytic activity and also the ability of biliverdin binding	687760	
1.3.7.4	D256E	mutant retains only partial activity	687760	
1.3.7.4	D263N	site-directed mutagenesis, the mutated enzyme retains biliverdin IXalpha binding activity and radical formation activity, whereas the PPhiB formation activity is negligible	763272	
1.3.7.4	E110Q	site-directed mutagenesis, the mutant shows 321.7% of wild-type activity	712484	
1.3.7.4	E187Q	site-directed mutagenesis, the mutant shows 20.3% of wild-type activity	712484	
1.3.7.4	H259Q	site-directed mutagenesis, the mutant shows 123.4% of wild-type activity	712484	
1.3.7.4	K183Q	site-directed mutagenesis, the mutant shows 24.6% of wild-type activity	712484	
1.3.7.4	K255Q	site-directed mutagenesis, the mutant shows 11.7% of wild-type activity	712484