2.3.1.257 expressed in Escherichia coli 2.3.1.257 expressed in Escherichia coli BL21 Star(DE3) cells 2.3.1.257 gene NAA40, quantitative real-time PCR enzyme expression analysis 2.3.1.257 gene NAA40, quantitative real-time PCR enzyme expression analysis in colorectal cancer cells 2.3.1.257 recombinant expression of hNaa40p in Escherichia coli strain BL21 StarTM (DE3), and of hNaa40p-V5 in HEK293 cells. Heterologous ectopically expression of hNaa40p in a Saccharomyces cerevisiae naa40-DELTA strain restores Nt-acetylation of yeast histone H4, but not H2A in vivo