Determination of the n-terminal amino acid sequence of mengbean leghemoglobin

Abstract

Four components of mungbean [ Vigna radiata (L.) Wilzeck] leghemoglobin (Lb) were identified and their N-terminal amino acid sequences were determined. The four components (Lb1, Lb2, Lb3, and Lb4) which differed in their isoelectric point are considered to be the products of at least two different genes. They have valine as the N-terminal amino acid residue which is a distinct feature of soybean Lba. However, they are peculiar because their amino acid sequences and those of the other legume hemoglobins differ in terms of the residue conserved at positions 4 (serine vs threonine), 13 (glycine vs serine), 14 (alanine vs serine), and 21 (aspartic acid vs asparagine) from the amino-terminal end. © Taylor & Francis Group, LLC.

Source or Periodical Title

Soil Science and Plant Nutrition

ISSN

380768

Page

475-483

Document Type

Article

Subject

Amino acid sequence, Leghemoglobin, Mungbean, Nitrogen fixation, Vigna radiata

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