Snap-heated freeze-free preservation and processing of the urine proteome

New method for urine proteome preservation and processing based on thermal stabilization and FASP digestion. Four urine proteomes were preserved during 48 h and 6 months using (i) the classic freeze preservation at -20 °C, (ii) snap-heated freeze-free preservation at laboratory temperature (20 °C) and (iii) snap-heated preservation at -60 °C.