Biochemistry (Moscow)

, Volume 74, Issue 8, pp 933–937 | Cite as

Nonaqueous titration of amino groups in polymeric matrix of plant cell walls

  • N. R. MeychikEmail author
  • Yu. I. Nikolaeva
  • I. P. Ermakov


Nonaqueous titration was used for detection of free amino groups in the polymeric matrix of plant cell walls. The content of amino groups varied in the range 0.54–0.91 and total nitrogen in the range 1.0–4.2 mmol per gram dry mass of cell walls depending on the plant species. However, these data on the high content of free amino groups do not correlate with the present day concept that the nitrogen fraction in charged amino groups in plant cell wall proteins, which are assumed to be mainly amino groups of lysine and arginine residues, is about 10%. It is supposed that most detected free amino groups belong to the hydroxy-amino acids hydroxyproline and tyrosine that can be bound at the hydroxyl group with the carbohydrate part of glycoprotein or another structural cell wall polymer.

Key words

amino groups cell wall plant roots 


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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • N. R. Meychik
    • 1
    Email author
  • Yu. I. Nikolaeva
    • 1
  • I. P. Ermakov
    • 1
  1. 1.Biological FacultyLomonosov Moscow State UniversityMoscowRussia

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