Dictionary > Millons test

Millons test

Definition
noun
A color reaction test using Millon’s reagent to detect phenolic compounds (e.g. tyrosine)
Supplement
French chemist Auguste Millon developed Millon’s test (thus the name) that can detect phenolic compounds, such as tyrosine. In this test, a reagent containing mercuric nitrate dissolved in nitric acid (called Millon’s reagent) is added to the test solution, and then heated. A red solution or precipitate that forms in heating is an indication that tyrosine is present (a positive result).
Since tyrosine is an amino acid occurring in nearly all proteins, Millon’s test is used for detecting proteins. Therefore, proteins without tyrosine residues cannot be detected using this test. Thus, other tests (e.g. biuret test) to confirm presence of proteins may be necessary.
Millon’s reagent is toxic and dangerous when its fumes are inhaled. Take caution in handling this reagent when performing this test.
Word origin: named after French chemist Auguste Millon who developed the test
See also:

  • biuret test

Related term(s):

  • Millon’s reagent


  • You will also like...

    Human Nervous System
    The Human Nervous System

    The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

    Lights' Effect on Growth
    Lights’ Effect on Growth

    This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

    Gene Regulation in Eukaryotes
    Gene Regulation in Eukaryotes

    Learn about the general structure of a eukaryotic gene, the transcription factors, and post-transcriptional regulation....

    Regulation of Biological Systems
    Regulation of Biological Systems

    Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..

    Structural depiction of catalase, an enzyme
    Protein Activity and Cellular Metabolism

    Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

    Early Mammals on Earth
    Early Mammals on Earth

    The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

    Related Articles...

    No related articles found

    See all Related Topics