Assessment of the protein quality of a new high-protein soybean cultivar by amino acid analysis

Composição centesimal e conteúdo de aminoácidos, ácidos graxos e minerais de seis cultivares de soja destinadas à alimentação humana

“…1) foram superiores aos da proteína padrão recomendada pela FAO (1985) para crianças de 2 a 5 anos (33,9 g/100 g de proteína). Resultados similares foram obtidos por Eldridge (1983), Zarcadas et al (1993Zarcadas et al ( , 1997 e Vasconcelos et al (1997).…”

Assessment of the protein quality of fourteen soybean [Glycine max (L.) Merr.] cultivars using amino acid analysis and two-dimensional electrophoresis

“…Because high protein seeds are of more commercial value, considerable efforts have been made to identify the most productive high protein cultivars that will grow in areas with longer daylengths (>16 h), shorter growing seasons (2300-2700 crop heat units), and more northern latitudes (latitude >45°N). As a result of new breeding initiatives, several new cultivars with improved yields, seed quality, protein content and quality, and disease resistance, are now being widely grown in the more northern regions of Canada, from Manitoba, through Ontario and Quebec, and into the Atlantic Provinces (Zarkadas, Yu, Voldeng, & Minero-Amador, 1993;Zarkadas, Voldeng, Yu, & Choi, 1999).…”

“…Soybean seeds contain an average of 36-38% protein and 19% oil, on a dry weight basis (Brumm & Hurburgh, 2002;Zarkadas et al, 1993Zarkadas et al, , 1999, but both genetic and environmental factors can strongly affect the seed composition (Krishnan, 2000). Soybean proteins are a complex polymorphic mixture of polypeptides, and like many species of the Leguminosae, soybeans contain four groups of proteins: the enzymes involved in metabolism, which do not exceed 1% of the total protein; structural proteins including both ribosomal and chromosomal; membrane proteins; and the storage proteins (Krishnan, 2000;Nielsen et al, 1997).…”

“…However, compared with meat, soybeans are deficient in sulfur-containing amino acids, with methionine being considered as the most significant limiting amino acid, followed by cyst(e)ine and possibly threonine (Zarkadas et al, 1993(Zarkadas et al, , 1999. Human nutritional studies, focusing on the utilization of various types of soybean products for adults, children, and full-term and premature infants, reported values for protein quality of processed soybean protein ranging from 62% to 92% of casein (Krishnan, 2000).…”

High protein soybean as a source of protein and energy for starter pigs

“…Dans le premier essai, au niveau d'inclusion plus eleves' AC proteus abaissait le taux i'ingestion et le GMQ, bien qu'il semble que ce soii d0 aux plus fortes concentrations de aa dans la ration ou au surchauffage du soja'durant la torrefaJon. Dans le second essai, on n'observait pratiquement aucun effet de I'inclusion de l,un ou l'autreiype de cultivar sur le GMQ, sur l'indice de Zarkadas et al (1993) reported that the balance of eisential amino acids in AC Proteus was excellent. Growth and digestibility trials with AC proteus in poultry diets (Chohan 1991;Chohan et al 1993) and a production trial with dairy cows (McNiven et al 19941 (Hurrell 1990).…”