Evidently you don't know the difference. Go check out the little computer program whose link I posted, read the papers by Breslauer and others, and get back to me. You're ignorant, and you're not even on the first step of the way to knowledge, awareness of your ignorance.
Being that you claim to be a professor and to have special knowledge of the subject at hand one must therefore ask whether:
You seem to be unduly obsessed the fact that I have a Ph.D. in biophysics and teach this subject at the graduate level, Gore3000. Let's talk about your credentials. Did you finish high school?
In time, learned sir, you will abandon your noble, but fruitless attempts to penetrate the barrier that shields the minds of certain creationists. You will learn the key to happiness -- placing certain posters on "virtual ignore," and then disregarding their mindless rants (it's easy, as they're usually in blue font). At that blessed moment, you will achieve the level of emotional tranquility that most of us have attained -- but only after enduring long periods of suffering such as you are now undergoing. It seems you must experience the pain and bewilderment first, and then comes the realization of ultimate wisdom -- some people are just flat-out beyond help. I sense that you are well on the road to enlightenment.
Yup, and they show that the various DNA codes A, C, G, and T join in absolutely the same way regardless of the linear order. So your statement was false, totally false. There is therefore no chemical reason for the ordering of DNA bases.