To analyze the presence of hypusine-containing eIF5A, cultures of the yeast strain VZL1074 transformed with plasmids containing the new eIF5A mutants were grown overnight at 25 °C in 5 mL of SC-ura media with raffinose, and then the cells were transferred into SC-ura media containing tetracycline and galactose to express the eIF5A mutants. After 6 hours of induction, samples were lysed in protein lysis buffer A (50 mM Tris-HCl pH 7.5; 50 mM dithiothreitol; 5 mM EDTA; 5% SDS; 5% glycerol; 2x Protease Inhibitor Cocktail), and 15 μg of whole cell extracts (WCE) were resolved by SDS-PAGE and transferred to a nitrocellulose membrane. We proceeded to perform immunoblot analysis using a rabbit polyclonal anti-eIF5A (yeast) antibody at a 1:15,000 dilution (Valentini et al. 2002 (link)), a rabbit polyclonal anti-hypusine antibody (Millipore) at a 1:1,500 dilution (Mandal et al. 2015 (link)) and a rabbit polyclonal anti-RPL5 (yeast) antibody at a 1:15,000 dilution with an enhanced chemiluminescence detection system on a Li-Cor C-Digit Blot Scanner.