Biomass equation for model testing
0.343 biomass_pro_c + 0.023 biomass_pigm_h + 0.325 biomass_mem_lipids_c + 0.052 biomass_tag_c + 0.005 biomass_dna_c + 0.037 biomass_rna_c + 0.215 biomass_carb_c ⇌ biomass_c