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AA Sequencing Reagents
Enzymes and chemicals.
13
Biochemistry
Undergraduate 3
01/30/2013

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Term
Mercaptoethanol, dithiothreitol, dithioerythreitol
Definition
Cleaves disulfide bridges. strong reducing agent
Term
iodoacetate
Definition
add S-CH2-Coo- to both ends of Sulfide bonds. prevents reformation. alkyalting agent
Term
Sangers reagent beta-floruro-2,4, dinitrobenzene
Definition
Reacts with N-terminal amino acid and labels it yellow.
Term
Edman's reagent, PITC
Definition
N-terminal Analysis
Term
Carboxypeptidase A
Definition
cleaves off any residue @ C terminus except Pro, Arg, Lys.
Term
Carboxypeptidase B
Definition
Only works on Arg and Lys
Term
Trypsin
Definition
Cleaves off C terminus of Arg and Lys
Term
Chymotrypsin
Definition
Cleaves off C terminus of Phe, Tyr, Trp
Term
Clostripain
Definition
Like trypsin but attacks Arg more than Lys.
Term
Staphylococcal protease
Definition
C side of Glu, Asp in phosphate buffer
Term
Pepsin
Definition
Cleaves at C end of Asp, Glu, Leu, Phe, Trp, Tyr
Term
Thermolysin
Definition
Cleaves at N-end of Leu, Ile, and Val
Term
Cyanogen Bromide
Definition
Met identification, Cleaves at C-end
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