Extraction and characterization of proteins from banana (Musa Sapientum L) flower and evaluation of antimicrobial activities

Kewalee Sitthiya, Lavaraj Devkota, Muhammad Bilal Sadiq, Anil Kumar Anal

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Ultrasonic assisted alkaline extraction of protein from banana flower was optimized using response surface methodology. The extracted proteins were characterized by Fourier transform infrared spectroscopy and molecular weight distribution was determined by gel electrophoresis. The maximum protein yield of 252.25 mg/g was obtained under optimized extraction conditions: temperature 50 °C, 30 min extraction time and 1 M NaOH concentration. The alkaline extraction produced a significantly high protein yield compared to enzymatic extraction of banana flower. Chemical finger printing of proteins showed the presence of tyrosine, tryptophan and amide bonds in extracted protein. Alkaline and pepsin assisted extracted banana flower proteins showed characteristic bands at 40 and 10 kDA, respectively. The extracted proteins showed antibacterial effects against both gram positive and gram negative bacteria. The high protein content and antimicrobial activity indicate the potential applications of banana flower in the food and feed industry.

Original languageEnglish
Pages (from-to)658-666
Number of pages9
JournalJournal of Food Science and Technology
Issue number2
Publication statusPublished - Feb 2018
Externally publishedYes


  • Alkaline extraction
  • Banana flower protein
  • FPLC

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