And so if we take the double strand DNA molecule and we add sodium hydroxide, we produce these two individual strands of DNA. Now, one of these single strands of DNA can actually be chosen for the sequencing process. Now, it doesn't matter which one of these DNA strands we choose, because if we choose this one, for example, then once we determine the sequence of this DNA strand, we can easily determine what the sequence of the other strand is because these two strands are complementary. They have complementary base pairing. So the G bases with our C and the A bases with our T. So once we know this sequence, we know what the other sequence is simply by the base parent process. So let's choose this single stranded DNA molecule.