Even Though Mass Spectrometry Has Been in Use for Over

question 81

Multiple Choice

Even though mass spectrometry has been in use for over a hundred years,it had only limited use with proteins until the 1980s because

• A)not many proteins had been discovered and purified before the 1980s.
• B)it was not possible to disperse charged proteins into a gaseous stream of particles.
• C)many proteins are difficult or impossible to crystallize.
• D)proteins decompose too quickly into their component amino acids.

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