Concentrations of protein, carotenoids, carbohydrates, and squalene in thraustochytrids cells. (A,B): protein; (C,D): carotenoids; (E,F): carbohydrates: (G,H): squalene. (A,C,E,G): MAN65; (B,D,F,H): MAN70. Glu: glucose; Gly: glycerol; Fru: fructose. * Significance levels: p < 0.05.