Protein contents flaxseed

The protein contents of flaxseed fractionation from research work in different countries is presented in Table III. The proximate protein contents of dehulled and/or defatted flaxseed varied considerably, depending on cultivar, growth location, and seed processing. Oomah and Mazza (1997) reported that the hull fraction contains lower protein levels, and... 

Albumin- and globulin-type proteins are the major proteins in flaxseed. According to Madhusudhan and Singh (1983), flaxseed albumin comprised 20% of total meal protein. Marcone et al. (1998) reported that the globulin fraction makes up 73.4% of total protein, and the albumin constitutes about 26.6%> of total protein. In contrast, Youle and Huang (1981) reported that 2S proteins accounted for 42%> of the total seed proteins. Sammour (1999) also reported albumin accounted for 40.2%> of the total protein content. 

AMINO ACID CONTENT (G/100 G PROTEIN) OF FLAXSEED PROTEIN FRACTIONS... 

The content of crude protein of the flaxseed meal extracted with different solvents is shown in Table 6. The two-phase solvent extraction system consisting of an alkanol and a hexane phase, increased the crude protein content of the meal, perhaps due to a concentration effect brought about by the removal of some polar compounds into the alkanol phase (Wanasundara and Shahidi, 1994a). The content of non-protein nitrogen compounds of the meal did not change considerably as a result of solvent extraction. 

Plessers et al 1962). In these trials, the yield for Camelina is better than that for either rapeseed or flaxseed grown in the same location. This first study demonstrated that Camelina is an excellent northern climate crop that is not susceptible to temperatures as low as -11°C but is highly susceptible to herbicides (Plessers et al., 1962). This is consistent with our observations that Camelina is susceptible to very low levels of residual class 2 herbicides in the soil. Furthermore, this first study reports that Camelina matures about 4 weeks more quickly than flax and that the protein yield is better than flax and has an average protein content of about 40%. Hence, this initial trial in 1958-60 demonstrates that Camelina has vast potential in the northern portions of the United States and in southern Canada as an alternative oil seed crop with a significant benefit to cold tolerance and quick maturity. 

Chia seed contains 25 0% oil and 18-30% protein. The chia meal is high in protein and fiber similar to flaxseed and soybean (52, 53). Chia seed, oil, and meal can be used as ingredients with high nutritional value for human food and animal feed. Chia seed contains mucilage and water-soluble fiber, may possibly contain lignans, and is similar to flax (53). Trials conducted in 1995 and 1996 showed yield and oil contents to be affected by growing conditions and harvested yields were up to 1500 kg/ha (52). 

Table 6. Crude protein and non-protein nitrogen content of flaxseed meal extracted with different solvent systems ...

The content of phytic acid in flaxseed meals is not reduced as a result of solvent extraction. Due to the association of phytic acid with proteins, in fact, its content tends to increase due to the removal of non-protein matter of seeds (Wanasundara and Shahidi, 1994a). 

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