Datuk Seri Dr Ahmad Zahid Hamidi says Barisan Nasional component parties should take care of their respective "DNA" in order to help the coalition win support.The Umno vice-president said that while he agreed with MCA president Datuk Seri Liow Tiong Lai's view that a component party's loss in the election was a Barisan loss, it was the responsibility of respective parties to strengthen their own "DNA" and members.