| dc.creator | Ortega Martinez, E.I. | |
| dc.creator | Villegas, E. | |
| dc.creator | Vasal, S.K. | |
| dc.date | 2013-06-07T21:07:45Z | |
| dc.date | 2013-06-07T21:07:45Z | |
| dc.date | 1986 | |
| dc.date.accessioned | 2023-07-17T19:56:36Z | |
| dc.date.available | 2023-07-17T19:56:36Z | |
| dc.identifier | http://hdl.handle.net/10883/1929 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7508781 | |
| dc.description | Protein changes were evaluated in two different maize genotypes of contrasting protein quality made into tortillas. In both types of maize, albumins, globulins, zeins, and glutelinlike components became insoluble after interacting with other biochemical entities catalyzed by the alkaline pH and the heat produced in tortilla-making. Increased nitrogen recovery with solvents having alkaline pH, a reducing agent, and sodium dodecyl sulfate indicate that hydrophobic interactions may have been involved in this change in solubility of proteins that are more easily solubilized in the unprocessed maize grain. In vitro protein digestibility with pepsin declined as nitrogen content increased in the glutelin fraction and in the residue after fractionation. Tortillas made from quality protein maize (QPM) had a superior amino acid score mainly because of their very high lysine and tryptophan content, which was not significantly affected during tortilla preparation. The superiority of the product obtained with the QPM sample was demonstrated by its high content of available lysine. Although the in sulfate indicate that hydrophobic interactions may have been involved in vitro digestibility of protein with pepsin and the amount of available lysine this change in solubility of proteins that are more easily solubilized in the changed during tortilla-making, no evidence was found of a specific unprocessed maize grain. In vitro protein digestibility with pepsin declined detrimental effect on the protein quality of the original QPM grain. | |
| dc.description | 446-451 | |
| dc.format | PDF | |
| dc.language | English | |
| dc.publisher | American Association of Cereal Chemists | |
| dc.rights | CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose. | |
| dc.rights | Open Access | |
| dc.source | 5 | |
| dc.source | 63 | |
| dc.source | Cereal Chemistry | |
| dc.subject | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY | |
| dc.subject | MAIZE | |
| dc.subject | PROTEIN QUALITY | |
| dc.subject | COOKING QUALITY | |
| dc.title | A comparative study of protein changes in normal and quality protein maize during tortilla making | |
| dc.type | Article | |
