Fig. 4From: Proliferation of hydrocarbon-degrading microbes at the bottom of the Mariana TrenchThe relative abundance and expression of genes associated with aliphatic hydrocarbon degradation increase in NBW. a The relative abundance of genes at different depths. b The top five affiliated genera of each gene are shown in the heat map. c Transcript abundance of alkB and almA in free-living samples from different depths. Asterisks in panel a indicate statistically significant difference in gene abundance between the two zonesBack to article page