code: public String getSequence(String chromosomeName, int start, int end) throws Exception {
  		twoBitParser.close();
  		twoBitParser.setCurrentSequence(chromosomeName);
  		return twoBitParser.loadFragment(start,end-start);
  	}
docs: Extract a sequence from a chromosome, using chromosomal coordinates
  
  @param chromosomeName
  @param start
  @param end
  @return the DNASequence from the requested coordinates.
  @throws Exception