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Pakistan Journal of Nutrition
Year: 2010  |  Volume: 9  |  Issue: 4  |  Page No.: 368 - 372

Protein and Amino Acid Compositions of Sphenostylis stenocarpa, Sesamum indicum, Monodora myristica and Afzelia africana Seeds from Nigeria

O.A. Ojiako, C.U. Igwe, N.C. Agha, C.A. Ogbuji and V.A. Onwuliri    

Abstract: Flours produced from raw, blanched and boiled seeds of Sphenostylis stenocarpa (African yam bean), Sesamum indicum (Sesame seed), Monodora myristica (Calabash nutmeg) and Afzelia africana (African oak) were evaluated for total protein and amino acid compositions. The results show that the seeds of S. indicum had the highest total protein content (24.74±0.56%) relative to those of S. stenocarpa (18.90±0.35%), M. myristica (12.83±0.40%) and A. africana (9.56±0.12%). The amino acid contents followed the pattern 0.030±0.010 mol/l for S. stenocarpa >0.025±0.005 mol/l for A. africana >0.014±0.003 mol/l for M. myristica >0.010±0.002 mol/l for S. indicum. The seeds were found to be rich in amino acids especially the essential amino acids which relative to the non-essential amino acids had high percentages of 81, 80, 77 and 70% for S. stenocarpa, M. myristica, S. indicum and A. Africana respectively. Boiling significantly (p<0.05) reduced the protein and amino acid contents of all the seeds, while blanching only significantly (p<0.05) reduced the amino acid contents of S. stenocarpa, S. indicum and A. Africana seeds. The results suggest that the seeds are potentially important plant sources of proteins and amino acids especially the essential amino acids necessary for human and livestock nutrition.

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