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.
Correct Answer:

Verified
Correct Answer:
Verified
Q76: What is the purpose of SDS in
Q77: The pKa's of arginine's α-Carboxyl group,α-Amino group
Q78: Cystine is likely to be isolated from
Q79: A sequence of amino acids with a
Q80: The primary structure of a protein specifically
Q82: At the isoelectric pH of an amino
Q83: Which shows a proper peptide bond?<br>A) <img
Q84: Amino acids are neutral at the isoelectric
Q85: Fossil dating by amino acid racemization measured<br>A)the
Q86: All 20 common amino acids have an