"The first section focuses on general concepts related to H2S and interactions with other reactive species in biological systems. The second section discusses methods of measuring and detecting H2S in complex biological environments. Topics covered in this second section include persulfidation, ion channel regulation, enzyme activation, and more. The third section covers methods for delivering H2S in biological environments and in response to different stimuli. The fourth and final section includes case studies on the impacts of exogenous H2S delivery in clinically relevant systems. The points of this section encompass a broad array of pharmacologically relevant systems in which H2S is established or predicted to play an important role"-- Provided by publisher.