Sia
Question
Chemistry
Posted 7 months ago
Sulphur test is a specific test for
a. cysteine
b. cystine
c. methionine
d. A and B are correct
Question: why isnt methionine correct since it contains sulphur?
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Answer from Sia
Posted 7 months ago
D
Key Concept
Sulfur test specificity
Explanation
The sulfur test is specific for detecting free thiol groups, which are present in cysteine and cystine but not in methionine, as methionine contains sulfur in a thioether linkage, which does not react in the same way.
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