Our new paper about protein utilization in the versatile lithoautotroph Cupriavidus necator (aka Ralstonia eutropha) was just deposited on BioRxiv.org. Integrating data from proteomics, resource allocation modeling, and a transposon mutant library, we found some really interesting things. For example, of the three chromosomes that C. necator owns, one encodes 80% of the protein mass (the housekeeping chromosome). The other chromosomes encode specialized functions like CO2 fixation genes and were probably acquired later in evolution. The expression of these genes conflicts with overlapping functions of the ancestral chromosome.