Appendix 1—figure 4. Energy-generating oxidation of reduced sulfur compounds in Endoriftia.

Proteins in bold were detected in this study. (Figure adapted from Grein et al., 2010; Markert et al., 2011; Rodriguez et al., 2011; Stewart et al., 2011; Dahl et al., 2013; Stockdreher et al., 2014; Weissgerber et al., 2014). As the role of hydrogen as electron donor in the Riftia symbioses was recently questioned (Mitchell et al., 2019), the associated reactions are labeled in gray and with a question mark.