code: public String printFASTA() {
  
  		StringBuffer buf = new StringBuffer();
  		String nl = System.getProperty("line.separator");
  		buf.append(">"+groups[0].getChain().getStructure().getIdentifier()+nl);
  
  		for (int g = 0; g < groups.length; g++){
  			buf.append(getSecStrucState(g).getType());
  		}
  		return buf.toString();
  	}
docs: Generate a FASTA sequence with the SS annotation letters in the
  aminoacid sequence order.
  @return String in FASTA sequence format