Expanding The Nucleic Acid Chemist's Toolbox: Fluorescent Cytidine Analogs
Bibliographic record
Abstract
The important and complex nature of nucleic acids has generated a great demand for tools and techniques to examine their environmental properties for diagnostic and structural purposes. Of the many tools available, none may find the ease of use and potential for broad application as readily as fluorescent nucleoside analogs. This chapter briefly describes the fluorescent properties and characteristics of a generous selection of fluorescent C analogs focusing on those nucleoside/nucleobase modifications that adhere to the principles of minimal structural modification and non-interference with canonical base pairing properties. It illustrates a variety of C analogs that possess widely varying characteristics ranging from the environmentally sensitive to the environmentally insensitive that may be prepared through the relatively modest modification of cytosine. Fluorescent C analogs have been successfully incorporated into synthetic DNA, RNA, and PNA oligonucleotides, and there is a wide variety of applications, which have demonstrated their potential usefulness.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.008 | 0.004 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".