Sulfurtransferases: Essential Enzymes for Life stands as the first comprehensive resource on this increasingly important class of enzymes. Following an introduction to the field from the Editors, each chapter covers a specific sulfurtransferase, including its basic biology and roles in healthy functioning, disease, drug discovery, and other biotechnological applications. The physiological function for each enzyme is considered in depth, along with regulation mechanisms, pharmacological inhibitors, and pathology and conditions related to altered enzymatic activity. Sulfurtransferases discussed include rhodanese, MST, thiosulfate-thiol sulfurtransferase, tRNA uracil 4-sulfurtransferase, thiosulfate-dithiol sulfurtransferases, biotin synthase, cysteine desulfurase, lipoyl synthase, molybdenum cofactor sulfurtransferase, thiazole synthase, molybdopterin synthase sulfurtransferase, molybdopterin synthase, tRNA-uridine 2-sulfurtransferase, tRNA-5-taurinomethyluridine 2-sulfurtransferase, tRNA-5-methyluridine (54) 2-sulfurtransferase, and L-aspartate semialdehyde sulfurtransferase, among others. Here, researchers will discover key knowledge and recent advances to bring forward new studies on this increasingly relevant class of enzymes, while clinicians may apply new findings in medical practice.