Apparent <i>in vivo</i> activity (nmol g⁻¹ day⁻¹) of the key enzymes in fatty acid biosynthesis pathways in rainbow trout fed with the two experimental diets with (H-Chol) or without (L-Chol) cholesterol fortification.

Data are presented as a mean ± s.e.m., n = 3, N = 6. P value: ns = not significant, * = P<0.05, ** = P<0.01. 1See Table 1 for experimental diet abbreviations. 2D9fad = fatty acid ▵-9 desaturase. 3D6fad = fatty acid ▵-6 desaturase. 4D5fad = fatty acid ▵-5 desaturase. 5Elovl5 & Elovl2 = fatty acid elongase (−5 and −2).