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Q

Test for alpha amino acids

A

Ninhydrin reagent

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Q

Violet complex (Ruhemann’s Purple);
Yellow for Proline

A

Ninhydrin Reagent

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Q

Test for Lysine

A

Schiff’s reagent

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Q

Pink-violet (+) lysine

A

Schiff’s reagent

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Q

Test for arginine (guanidine group)

A

Sakaguchi

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Q

Red-orange (+) arginine

A

Sakaguchi

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Q

Old rose

A

Millon-Nasse

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Q

Test for aromaticity (F, W, Y)

A

Xanthoproteic

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Q

Yellow-orange (+) WYF

A

Xanthoproteic

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Q

Tyrosine (phenolic grp)

A

Millon-Nasse

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Q

Tryptophan (indole group)

A

Hopkins-cole and Bromine water

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Q

Pinkish-lavender or violet-alcohol layer (+) W

A

Bromine water

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Q

Violet complex (+) W

A

Hopkins-cole

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Q

Test for cysteine

A

Fohl’s Test / Lead Acetate and Nitroprusside Test

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Q

Test for peptide linkages

A

Biuret test

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Q

Black (+) cysteine

A

Fohl’s Test / Lead Acetate

Q

Red complex (+) Cysteine

A

Nitroprusside test

Q

Blue-violet (+) Peptide linkages

A

Biuret test

Q

Red/purple (+) Y, H

A

Pauly-Diazo Reaction

Q

Tyrosine, Histidine

A

Pauly-Diazo Reaction