code: public static final void transform(Structure structure, Matrix4d m) {
  		for (int n=0; n<structure.nrModels();n++) {
  			for (Chain c : structure.getChains(n)) {
  				transform(c, m);
  			}
  		}
  	}
docs: Transforms a structure object, given a Matrix4d (i.e. the vecmath library
  double-precision 4x4 rotation+translation matrix). The transformation
  Matrix must be a post-multiplication Matrix.
  
  @param structure
  @param m