Fig. 4

A Percentage of flexome genes present in the metagenome and expressed in the metatranscriptome of different Tara stations. A red star indicates the samples compared in C. B Recruitment of the flexible gene pool of gMED in the metagenomes and metatranscriptomes of the Tara stations, shown as RPKG values. The categories of the functional annotations are indicated by letters from COG database. C Scatter plot showing the relationship between the recruitment in the metagenome and the metatranscriptome of the flexome in Tara_025 (Mediterranean Sea, 50 m depth) and Tara_096 (Pacific South-East, 5 m depth). Expression was compared to the housekeeping gene rpoB (red dashed line). COG categories are color-coded, and triangles indicate transporters. RPKG, reads recruited per kilobase of the genome per gigabase of the metagenome