chemical tests for proteins Flashcards
1
Q
(+) for peptide bonds
A
biuret test
2
Q
red coloration
A
nitroprusside test
3
Q
reagents of conc. HNO3 and conc. NaOH
A
xanthoproteic test
4
Q
(+) for phenolic group of tyrosine
A
millon’s test
5
Q
red to red-orange color
A
sakaguchi test
6
Q
reagents of NaOH and CuSO4
A
biuret test
7
Q
(+) for the indole group of tryptophan
A
hopkins cole test
8
Q
(+) for methionine and cysteine
A
fohl’s test
9
Q
(+) for guanidino group of arginine
A
sakaguchi test
10
Q
reagent is 1,2,3-indanetrione monohydrate / triketohydrindene with EtOH
A
ninhydrin test
11
Q
(+) for cysteine
A
nitroprusside test
12
Q
(+) for histidine and tyrosine
A
pauly’s test
13
Q
reagent is lead acetate
A
fohl’s test
14
Q
blue to blue-purple or yellow-orange product
A
ninhydrin test
15
Q
(+) for proline in orsnge residue
A
ninhydrin test
