Supplement to: Baxter, Allix J; Hopmans, Ellen C; Russell, James M; Sinninghe Damsté, Jaap S (2019): Bacterial GMGTs in East African lake sediments: Their potential as palaeotemperature indicators. Geochimica et Cosmochimica Acta, 259, 155-169, https://doi.org/10.1016/j.gca.2019.05.039