TriPer, an optical probe tuned to the endoplasmic reticulum tracks changes in luminal H2O2.

This work is supported by grants from the Wellcome Trust (Wellcome 200848/Z/16/Z, WT: UNS18966), Fundacao para a Ciencia e Tecnologia, Portugal (PTDC/QUI/BIQ/119677/2010 and UID/BIM/04773/2013-CBMR), European Commission (EU FP7 Beta-Bat No: 277713), EPSRC (1503478), MRC (MR/K015850/1), and a Wellcome Trust Strategic Award for core facilities to the Cambridge Institute for Medical Research (Wellcome 100140). DR is a Wellcome Trust Principal Research Fellow.