Rotation-translation operators.

I have changed the form of the rotation and translation operations used to present the results of my earlier studies on neuraminidases, galactose oxidase and haemoglobin. The Convention used by the International Union of Crystallographers is that the rotation should precede the translation. I have now amended the papers linked to this blog to conform with that Convention. Previously I specified the translation before the rotation. The one paper I have not yet amended is the older pdf version of the neuraminidase paper.