code: public void align(Structure s1, String chainId1, Structure s2,
  			String chainId2) throws StructureException {
  		align(s1, chainId1, s2, chainId2, params);
  	}
docs: Align two chains from the structures. Uses default parameters.
  
  @param s1
  @param chainId1
  @param s2
  @param chainId2