2020 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277093/ 2013 https://bpspubs.onlinelibrary.wiley.com/doi/10.1111/bph.12171 BPS Publications Background and Purpose Hydrogen sulfide (H2S) is a signalling molecule that belongs to the gasotransmitter family. Two major sources for endogenous enzymatic production of H2S are cystathionine β sy... bpspubs.onlinelibrary.wiley.com