Regioisomer separation and identification of triacylglycerols containing vaccenic and oleic acids, and α- and γ-linolenic acids, in thermophilic cyanobacteria Mastigocladus laminosus and Tolypothrix sp.

► Over 70 triacylglycerols having at least one PUFA were found in two Tolypothrix cyanobacteria. ► The Tolypothrix strains from different localities produce different TAGs. ► Proportion of positional isomers of Mastigocladus TAGs from different localities also differs.