 Later, the Yale group collected more diffraction data, and in 1970 published the RNase S structure in full detail at 2.0 Å resolution ().Coordinates for ribonuclease S were deposited into the international Protein Data Bank in 1973 as , among the first small set of macromolecular structures.The black-and-white ribbon drawing above shows the large, twisted beta sheet (arrows) of ribonuclease, flanked by several alpha-helices (spirals).