Superman's DNA

That's actually one of the things writers purposetly leave it aside, so not to raise too many questions. The fingerprints point.

I'm sure he leaves fingerprints everywhere he goes, so just like his glasses, and given today's facial recognition softwares, Clark could never have a secret ID. Just one of those things writers conveniently leave out.

Has for his DNA. The problem isn't getting his DNA seeing the times he's bled on the battlefield, the problem is decoding his DNA.

Even in the pre-Flashpoint, cloning Superman usually resulted in creating Bizarros that lived for very short periods of time. The only next best thing was creating hybrids. Part human, part kryptonian.

Initially it was said that kryptonians had some sort of meta-genes unique to their race, but those meta-genes could not be duplicated or decoded, they were simply too complex.

Then they changed it to the entire kryptonian DNA. They never specified exactly what in their DNA made it so much more complex compared to human DNA. After all if they could create hybrids, how much complex could it actually be.

Then in one comic a very good explanation was actually given during the Super-Chief comic. Where the leader of the Doom Patrol, The Chief, captured a kryptonian from New Krypton placed him in a special room that emited red sunlight, then placed him in a comatose state while he performed live vivisections on the kryptonian, opening him up to examine his organs, all kinds of demented things.

We then see a scene where The Chief is inquioring a A.I that he was using, about what gave kryptonians their abilities and why. The A.I. clearly states that nothing in their organs explains it, nor did their DNA structure, seeing that it was a double helix like our own, with basically the same number of chromosomes. The only thing that stood out was their DNA molecular structure.

That there were unknown atoms that composed it, sugesting the existance of some kind of exotic material on Krypton's geological makeup that passed on to all kryptonian lifeforms.

And it was those unique atoms that gave kryptonian their abilities.

But because they were exotic in nature, they couln't be reproduced artificially, only transplanted. And so the Chief did that to himself. He used some machine to transfer the molecular material from the kryptonian to himself.

And he gained all of a kryptonian natural powers, but also gained their weaknesses. Also during the process a part of the mind of the comatose kryptonian transfered to him, making his mind become even more unstable.

In the end Superman stopped him, and he was placed in a kind of stasis prison.

In the New 52 the DNA complexity has once again been approached. First in the Superboy comics and then in Action Comics, and once again during the Forever Evil arc.

And it might again be approached during March conclusion of the Sagave Dawn arc, where Superman fixes his powers.

I remember that in All-Star, Supes managed to read his one DNA base sequence... then gave it to the skinny scientist who made a second Superman (or was implied to)

Realistically that explanation you mentioned makes sense, as assuming the bases his DNA and RNA are made of are adenine, thymine, cytosine, guanine and uracil then he wouldn't have any kinds of powers