Figure 5

Combining balls and sticks style side chains with ribbons. β-Strands 3 (H52-L63) and 4 (W67-T78) of the retinol-binding protein [PDB:1AQB] are shown as ribbons (main chain) with side chains added as a balls and sticks style display. The small gray spheres that appear to be imbedded in the ribbon are the α-carbons of the main chain.