Cytiva Glutathione Sepharose 4B Human viperin catalyzes the modification of GPP and FPP potentially affecting cholesterol synthesis Mikulecky 2018 FEBS Letters Wiley Online Library A novel approach for separating bacteriophages from other bacteriophages using affinity chromatography and phage display Scientific Reports Crystal structure of the cohesin loader Scc2 and insight into cohesinopathy PNAS