Disclosed is a protein isolate comprising a protein content of at least 90% (w/w) protein comprising: i) a first protein fraction comprising between 10% (w/w) and 40% (w/w) 2S protein； and ii) a second protein fraction comprising between 30% (w/w) and 70% (w/w) 12S protein. Further disclosed is a protein isolate comprising a protein content of at least 90% (w/w) protein comprising: (i) a first class of proteins having a molecular weight between 225 and 275 kDa, the first class of proteins comprising between 50-70% (w/w)； (ii) a second class of proteins having a molecular weight between 40 and 60 kDa, the second class of proteins comprising between 3-8% (w/w)； (iii) a third class of proteins having a molecular weight between 20 and 40 kDa, the third class of proteins comprising between 2-6% (w/w)； (iv) a fourth class of proteins having a molecular weight between 7 and 15 kDa, the fourth class of proteins comprising between 10-20% (w/w)； (v) a fifth class of proteins having a molecular weight between 3 and 10 kDa, the fifth class of proteins comprising between 10-20% (w/w)； and (vi) a sixth class of proteins having a molecular weight of less than about 5 kDa and comprising less than about 1 % (w/w) of the protein isolate. Further disclosed is a process for producing a protein isolate from an oilseed meal, the process comprising: i) mixing the oilseed meal with a first blending solvent to form a mixture； ii) optionally treating the mixture with phytase at a temperature and a pH suitable for phytase activity； iii) optionally adjusting the pH of the mixture to solubilize proteins in the mixture； iv) subjecting the mixture to a g-force sufficient to separate the mixture to form a) a fiber fraction, and b) a protein fraction comprising (i) an insoluble protein fraction, and (ii) a soluble protein fraction； v) separating the insoluble protein fraction from the soluble protein fraction to recover therefrom an insoluble protein concentrate and a soluble protein extract； and v
