Which of the following amino-acids is measured at a wavelength of 440nm using photometric systems?
A. Proline
B. Alanine
C. Glutamine
D. Valine
Answer:A
Which of the following amino-acids is measured at a wavelength of 440nm using photometric systems?
A. Proline B. Alanine C. Glutamine D. Valine
Explanation: Proline and hydroxyproline are measured at 440nm. All the other amino-acids are measured at 570nm.