Template:POTD/2009-11-19
A 1981 ribbon diagram, a 3D schematic representation of protein structure that is one of the most common methods of protein depiction used today, of a triosephosphate isomerase monomer. Hand-drawn by Jane S. Richardson who originally devised the concept, the barrel of eight beta strands is shown by green arrows and the eight alpha helices as brown spirals.Image credit: Jane S. Richardson