Escher map of core pathways in iIsor850. An Escher map consists of metabolites (circles) connected via reactions (lines) which indicate directionality ofallowable fluxes (arrows). The core components of iIsor850 were drawn and placed according to relevant classifications. For clarity, not all reactions for the metabolitesare shown, and some metabolites occur more than once (i.e., cofactors). Amino acid biosynthesis is indicated in blue, nucleotide biosynthesis is brown, lipidbiosynthesis is purple, cell wall biosynthesis is green, fatty acid biosynthesis and elongation is yellow, cofactors and prosthetic groups biosynthesis is red. Centralmetabolism is uncolored in the middle-top of the figure.