Codon usage and tRNA gene copy number for Lys, Gln and Glu.

N.P: Not provided.a4932 S. pombe ORFs are described in [42].b30 ORFs with highest expression levels, obtained from [42].c50 genes most up-regulated after treatment with 0.5 mM of H2O2 during 30 minutes [4].dThe number of mRNA molecules per cell at basal levels was obtained from [42].The number of mRNA molecules per cell at induced levels was calculated using the fold induction ratios upon 0.5 mM of H2O2 during 30 minutes from microarray experiments reported at [4].eCodon usage values of ‘Total S. pombe ORFs’ and ‘Highly expressed ORFs’ were obtained from [42].The other codon usage values were calculated using free software ACUA v1.0 [43].ftRNA gene copy number was extracted from PomBase [61].