Yes. Within "The Chemical Reactions of Amino Acids / Reactions of Amino Groups" there are several examples - one of which is the ninhydrin reaction. A very widely applied reaction of the alpha amino group [that is the N in the peptide bond -CCN-CCN-], it is used to estimate the quantity of amino acids [in a sample] in very small amounts.
All amino acids and polypeptides with a free alpha group react with ninhydrin and yield [or produce] an intensely purple colored product - except for Proline and Hydroxyproline {both in which the alpha amino group is termed to be 'substituted' - something to do with carbon rings} which "yield derivatives with a characteristic yellow color."
See also 'Schiff's bases'.
Proline reacts with ninhydrin, but in a different way. While most ninhydrin tests result in a purple color, the proline reaction is more yellow due to substitution of the alpha amino group that ninhydrin reacts with. This has to do with carbon rings.
Most primary amino acids give a purple colour with ninhydrin. Proline, though, gives a yellow colour.https://biochembro.wordpress.com/2013/02/18/yellow-result-from-ninhydrin-test/
It does react with proline, along with hydroxyproline and other alpha amino acids to form a yellow colored solution.
Since it's a secondary α-amino acid that doesn't have a free amino group
Since it's a secondary α-amino acid that doesn't have a free amino group
Yes, ninhydrin reagent reacts with proline. Proline and hydroxyproline yield a yellow coloured product unlike other amino acids that yield a puple colored product.
The yellow color in the reaction of the proline amino acid and ninhydrin is Avagadbro.
becoz proline is secondary amine...
In this reaction the yellow xanthoproteic acid is formed.
it makes a Yellow colour when it is made and it is also a Chemical reaction thats why it allwasy stinks
No colour because Yellow is a Primary Colour
It is not yellow
the opposite colour of yellow is purple on the colour wheel.
It would be the amine group. In fact, ninhydrin will react with other amines, not necessarily those in proteins or amino acids. it reacts with free amines to produce blue-purple color and yellow in proline.
When ammonia or primary and secondary amines are detected, a deep blue or purple color known as Ruhemann's purple is produced. Ninhydrin can also be used to monitor deprotection in solid phase peptide synthesis (Kaiser Test). The chain is linked via its C-terminus to the solid support, with the N-terminus extending off it. When that nitrogen is deprotected, a ninhydrin test yields blue. Amino-acid residues are attached with their N-terminus protected, so if the next residue has been successfully coupled onto the chain, the test gives a colorless or yellow result.
In this reaction the yellow xanthoproteic acid is formed.
butt colour and reaction - yellow slant colour and reaction - yellow carbohydrate fermented - glucose only H2S production :- blackening- NO H2S - (-) negative
Well, the best I could come up with is it's either:C9H6O2orC4H3O2If someone knows any different please correct me.jman63: it is actually C9H6O4
it makes a Yellow colour when it is made and it is also a Chemical reaction thats why it allwasy stinks
There is a dark blue colour when iodine is added to starch instead of a yellow sort of colour when iodine is added to a substance without starch.
1. biuret test 2. xhenthoproteic test 3. millon's test 4. Cole's aldehyde test 5. sakaguchi test 6. lead acetate test 7. ninhydrin test 8. gram negative bacteria test 9. phenolphthalein test
yellow and green
No colour because Yellow is a Primary Colour
sort of brown and yellow colour
yellow yellow yellow yellow