Substrate	Reference(s)	Comment(s)
caffeic acid	Salmon, R. C., Cliff, M. J., Rafferty, J. B., & Kelly, D. J. (2013). The CouPSTU and TarPQM Transporters in Rhodopseudomonas palustris: Redundant, Promiscuous Uptake Systems for Lignin-Derived Aromatic Substrates. PLoS ONE, 8(3), e59844. https://doi.org/10.1371/journal.pone.0059844	-
cinnamic acid	Salmon, R. C., Cliff, M. J., Rafferty, J. B., & Kelly, D. J. (2013). The CouPSTU and TarPQM Transporters in Rhodopseudomonas palustris: Redundant, Promiscuous Uptake Systems for Lignin-Derived Aromatic Substrates. PLoS ONE, 8(3), e59844. https://doi.org/10.1371/journal.pone.0059844	-
ferulic acid	Salmon, R. C., Cliff, M. J., Rafferty, J. B., & Kelly, D. J. (2013). The CouPSTU and TarPQM Transporters in Rhodopseudomonas palustris: Redundant, Promiscuous Uptake Systems for Lignin-Derived Aromatic Substrates. PLoS ONE, 8(3), e59844. https://doi.org/10.1371/journal.pone.0059844	-
p-coumaric acid	Salmon, R. C., Cliff, M. J., Rafferty, J. B., & Kelly, D. J. (2013). The CouPSTU and TarPQM Transporters in Rhodopseudomonas palustris: Redundant, Promiscuous Uptake Systems for Lignin-Derived Aromatic Substrates. PLoS ONE, 8(3), e59844. https://doi.org/10.1371/journal.pone.0059844	-