Methods are disclosed for sterilizing preparations containing albumin to reduce the level of one or more active biological contaminants or pathogens therein, such as viruses, bacteria (including inter- and intracellular bacteria, such as mycoplasmas, ureaplasmas, nanobacteria, chlamydia, rickettsias), yeasts, molds, fungi, prions or similar agents responsible, alone or in combination, for TSEs and/or single or multicellular parasites. These methods involve sterilizing preparations containing albumin, such as plasma protein fractions, with irradiation.


> In vivo production of cyclic peptides for inhibiting protein--protein interaction

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