Expression changes in genes involved in milk fat metabolism pathway along the course of lactation. Stages of lactation are shown in x-axis and the RPKM gene expression values are shown in y-axis. Gene names are given in the legend. Fat metabolism in milk was divided in to six sections as: A) Fatty acid uptake, B) De novo fatty acid synthesis, C) Fatty acid desaturation, D) Fatty acid esterification, E) Regulation of fatty acid synthesis, F) Milk fat secretion. Most of the genes in fat metabolism pathway showed high expression in transition and peak lactation milk.