Objective To improve the in-gel digestion of 2-D gel electrophoresis after silver staining.Methods Modified method(adding non-ionic detergent n-dodecyl-β-D-maltoside in-gel digestion) and original method were compared by nanoUPLC-electrospray ionization tandem mass spectrometry(HD-MS).Results Ten protein spots on 2-D gel were identified using the two methods.However,the amino acid sequence coverage in 60% proteins identified using the modified method was significantly higher than that identified using the o...