 Triacylglycerols, tags, are major storage lipids found in developing seeds, flower petals, pollen grains, and fruits of many plant species. They have great nutritional and nutraceutical value and are a common source of edible oils for human consumption and industrial purposes. Two metabolic pathways for tag production have been clarified, an acyl-CoA dependent pathway and an acyl-CoA independent pathway. Lipid metabolism, including fatty acid and tag biosynthesis, is well understood in plants but poorly known in algae. Algae synthesize and localize individual classes of lipids in a specific cell, tissue or organ, unlike higher plants where the complete pathway from carbon dioxide fixation to tag synthesis and sequestration takes place within a single algal cell. Some algae have large amounts of very long-chain polyunsaturated fatty acids, VLC, Pufas, as major fatty acid components. The focus of attention in biotechnology is the isolation of novel fatty acid metabolizing genes, especially elan gases and desaturases from different species of algae and its transfer to plants to boost seed oil content and generate desirable fatty acids through genetic engineering approaches. This article was authored by Alexandro Colliery, Rogerio Margus, Felipe dos Santos Mariskin and others. We are article.tv, links in the description below.