E-Mail IMAGE: A pollen tube that grows out of a polen grain with certain fluorescently labelled building blocks. In green: PIP5K2 , the enzyme responsible for the production of lipid nano domains... view more Credit: Marta Fratini Lipids are the building blocks of a cell's envelope - the cell membrane. In addition to their structural function, some lipids also play a regulatory role and decisively influence cell growth. This has been investigated in a new study by scientists at Martin Luther University Halle-Wittenberg (MLU). The impact of the lipids depends on how they are distributed over the plasma membrane. The study was published in "