1.8.4.8	C239S	mutant enzymes Cys239Ser and Tyr209Phe are inactive	
1.8.4.8	K144A |	the mutation causes a 63000fold increase of kcat/KM and decreases the value of kmax by 270fold. Relative to the wild type enzyme, the affinity of adenosine 5’-phosphosulfate for K144A is decreased by 400fold	
1.8.4.8	additional information	a mutant lacking glutathione reductase and glutaredoxins does barely grow on sulfate, strains containing a mutant C9S/C12S glutaredoxin grow poorly	
1.8.4.8	Q160L	mutant enzyme Gln160Leu is as active as the wild-type enzyme	
1.8.4.8	Y209F	mutant enzymes Cys239Ser and Tyr209Phe are inactive