[AndrewC]

The reason for this lies not in the sequence but in the structure.

Joe eats shark

Shark eats Joe

Shark Joe eats

Joe shark eats

Eats Joe shark

Eats shark Joe

[Nebullis]

I have no idea where you are going with that. Most people view the genetic code as a linear sequence of information, independent of structure, much like the code of a computer program.