TL;DR: This study combined single-cell analyses of CO2 fixation, CO2 release and bulk uptake, with measurements of O2 respiration, sulfur content, and polyhydroxyalkanoate content, as well as mathematical modelling to investigate how energy derived from sulfur oxidation drives carbon fluxes within the symbiosis and between the holobiont and its habitat found that under aerobic conditions without external energy sources only the primary symbiont relied on internal sulfur storage. (via Semantic Scholar)