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Which of the following amino-acids is measured at a wavelength of 440nm using photometric systems?

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Which of the following amino-acids is measured at a wavelength of 440nm using photometric systems?

(a) Proline

(b) Alanine

(c) Glutamine

(d) Valine

The question was asked in an interview for job.

Origin of the question is Amino-Acid Analysers topic in chapter Chromatography of Analytical Instrumentation

1 Answer

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Best answer
Correct choice is (a) Proline

To explain: Proline and hydroxyproline are measured at 440nm. All the other amino acids are measured at 570nm.

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