Disclaimer: Don't own Square-Enix or Disney. ) I also didn't fail Biology at high school (well, I haven't yet, I suppose), but I'm not qualified to talk about DNA or RNA. ;D
Challenge: 157 -- Double Helix (for kh(underscore)drabble(AT)LiveJournal).
Spoilers: Nooooooone.
Notes: The title of this piece is the molecular formula for Uracil. xD Also, this may seem like it relies heavily on knowledge of DNA formation, but as far as I know it won't not make sense if you don't know anything. It just might be more interesting if you do.
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u·ra·cil; n. - A pyrimidine base, C4H4N2O2, that is an essential constituent of RNA.
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During Biology classes, Roxas would almost always stare out the window, his brain focused on things like trips to the beach on their next set of holidays, or what he and his friends would talk about on their way home that night. But, their study of DNA fascinated him irrationally, and any time the fated deoxyribonucleic acid was mentioned in class, Roxas would be the first to raise his hand, the first to recite any answer to do with the basis of all chemical formations.
G, T, C, A. Guanine, Thymine, Cytosine, Adenine. They were Roxas' favourite letters, and he would doodle helices all over his workbooks during his Biology classes. His fascination with them one day caused Olette to teasingly call him the RNA of the group, the only one of them actually interested by any of the technical terms; the only one who listened in class because he was fascinated, and not just because they had to pass the subject. He was their single strand, their complementary strand, the only strand that felt like it could ever leave the nucleus and go on to become something greater.
But while Roxas joked along with them, and enjoyed his new nickname ("Roxasnucleic acid!" Olette had giggled, Hayner and Pence looking on in mock disgust at their school-related conversation), the thought of RNA reminded him of only one thing: U. Uracil. The mystery base. Nobody ever knew why it would only attach to RNA, but it did, replacing Thymine as the new complement to Adenine. And, for some reason, U would always remind Roxas of Sora.
It was as though the jokingly-named Roxasnucleic acid would never be complete without its equally joking Soracil, Adenine left unpaired unless Sora was found to finish the sequence. But it was so hard for Roxas to find Sora, and even harder to make him stay. The bonds between them couldn't be made correctly, and Sora was endlessly floating away, to be lost in a sea of bases and faces that Roxas didn't need or desire.
But Roxas never truly realised (until finally the two bonded eternally) that Sora was more than just a U. Yes, Sora was the missing link, Sora was the Uracil that could only ever attach to Roxas' RNA, but he was much more than that too. While Roxas was a single strand, the RNA, Sora was not only his Uracil, but his opposite as well. Roxas didn't know it, but Sora's memories were needed as the Uracil, the little pieces to close the gaps in his pairings, and his body was needed to be Roxas' friend, his partner… his complementary strand.
When Roxas and Sora joined, their single strands mixed, the sugars and the phosphates and the bases linking together, with the Soracil glue bonding them. Sora and Roxas, though neither of them really understood until the day when their bodies merged, created the basis for their new connected lives; the double helix.