methods to determine primary structure?
chemical- edman deg
physical- MS
biological- DN sequencing, next gen seq
how does chemical peptide cleavage occur?
cyanogen bromide
how does enzymatic peptide cleavage occur?
trypsin or chymotrypsin
edman method of protein sequencing
disulfide bonds reduced - GluHCL
sanger reagent
advantages of MS over Edman
more sensitive, faster
doesnt require pure proteins
identifies blocked/mod proteins