Some physicochemical and antinutritional properties of raw flours and protein isolates from Mucuna pruriens (velvet bean) and Canavalia ensiformis (jack bean)

Authors

  • David Betancur-Ancona,

    1. Facultad de Ingenieria Química, Universidad Autónoma de Yucatán, Av. Juárez No. 421 Col. Cd. Industrial, Apdo. Postal 1226-A, 97288 Mérida, Yucatán, México.
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  • Santiago Gallegos-Tintoré,

    1. Facultad de Ingenieria Química, Universidad Autónoma de Yucatán, Av. Juárez No. 421 Col. Cd. Industrial, Apdo. Postal 1226-A, 97288 Mérida, Yucatán, México.
    2. Current address: Centro de Investigación y Asisténcia en Tecnología y Dieño del Estado de Jalisco, A.C. Unidad Sureste. Interior CANACINTRA, Calle 30 No. 151 × 7 y 7A, Col. Garcia Ginerés, 97070 Mérida, Yucatán, México.
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  • América Delgado-Herrera,

    1. Facultad de Ingenieria Química, Universidad Autónoma de Yucatán, Av. Juárez No. 421 Col. Cd. Industrial, Apdo. Postal 1226-A, 97288 Mérida, Yucatán, México.
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  • Virginia Pérez-Flores,

    1. Facultad de Ingenieria Química, Universidad Autónoma de Yucatán, Av. Juárez No. 421 Col. Cd. Industrial, Apdo. Postal 1226-A, 97288 Mérida, Yucatán, México.
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  • Arturo Castellanos Ruelas,

    1. Facultad de Ingenieria Química, Universidad Autónoma de Yucatán, Av. Juárez No. 421 Col. Cd. Industrial, Apdo. Postal 1226-A, 97288 Mérida, Yucatán, México.
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  • Luis Chel-Guerrero

    Corresponding author
    1. Facultad de Ingenieria Química, Universidad Autónoma de Yucatán, Av. Juárez No. 421 Col. Cd. Industrial, Apdo. Postal 1226-A, 97288 Mérida, Yucatán, México.
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*Fax.: 52 999 9460994; e-mail: cguerrer@uady.mx

Summary

The legumes Canavalia ensiformis and Mucuna pruriens are underexploited in tropical Mexico. Their seeds have good nutritional potential, but contain antinutritional factors. Physicochemical and antinutritional properties were determined for raw flours (RF) and protein isolates (PI) produced from these legumes. Protein content in the PI was 737 g kg–1 for C. ensiformis and 666 g kg–1 for M. pruriens. Protein isolation improved in vitro digestibility, while maintaining high lysine levels and adequate sulphur amino acids content. Antinutritional factors such as cyanogenic glucosides, cyanide precursors from hydrolysis, tannins and trypsin inhibitors were lower in the PIs than in the RFs. The reduction in canavanine levels, a structural analogue of arginine, in the C. ensiformis PI was noteworthy. These PIs thus have potential applications in the development of new food ingredients in tropical regions using processes that improve nutritional value.

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