Open AccessProtein Content and Amino Acid Balance of Yams
Author(s) -
Frances Martin,
A. E. Thompson
Publication year - 1973
Publication title -
the journal of agriculture of the university of puerto rico/the journal of agriculture of the university of puerto rico
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 10
eISSN - 2308-1759
pISSN - 0041-994X
DOI - 10.46429/jaupr.v57i1.10757
Subject(s) - methionine , cystine , kjeldahl method , amino acid , cultivar , chemistry , lysine , protein quality , composition (language) , hydrolysis , biochemistry , biology , food science , botany , cysteine , nitrogen , enzyme , linguistics , philosophy , organic chemistry
The total protein of 38 yam (Dioscorea) cultivars, as tested by Kjeldahl methods, and their amino acid composition, determined by high temperature hydrolysis and GLC chromatography, are reported. Species and varieties differed in total protein and total amino acid contents. Proteins of four species, but not D. alata, were somewhat low in lysine. Proteins of all species were deficient in sulphur-containing amino acids, methionine, and especially cystine. Varietal differences, however, suggest that cultivars can be selected with more balanced protein.