Chapter 3 Exploring Proteins and Proteomes. questions and answers

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11 Proteins can be separated from small molecules and ions through a semi-permeable membrane by __________________. Ans: dialysis Section: 3.2 12 Exclusion gel or gel-filtration chromatography sepa... rates molecules on the basis of __________________. Ans: size Section: 3.1 13 __________________ is a chemical reagent that is often used to detect the presence of amino acids. Ans: Ninhydrin Section: 3.2 14 In the Edman procedure for peptide sequence, phenyl isothiocyanate is used to selectively remove the __________________ residue as a PTH-derivative. Ans: N-terminal Section: 3.2 15 Disulfide bonds in peptides and proteins are readily oxidized to cysteic acid residues by treatment with __________________. Ans: performic acid Section: 3.2 16 MALDI-TOF is the abbreviation for __________________. Ans: Matrix-Assisted Laser Desorption and Ionization Time of Flight mass spectrometer Section: 3.5 [Show More]

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