Redoxoma NewsletterSeptember 2019 Cover image adapted from original by Erin Rod, at Wikimedia (licensed by CC-BY-SA 4.0) Contents Editor's pageby Francisco Laurindo & Flavia MeottiEditorial Main Articleby Marcelo A. CominiFluorescent protein-based biosensors: potent tools to shed light on redox biochemistry and biology Redoxoma Highlightsby Sergio Menezes and Alicia KowaltowskiA link between mitochondrial shape and function in Ca²⁺ signaling Redoxoma Highlightsby Daniela TruzziRevealing the cross-talk between nitric oxide metabolites Redoxoma Highlightsby Francisco R. M. LaurindoThe evolution of Redoxoma Word Cloud: an essay on [not-that-] useless trivia