Bibliographic record
Abstract
花色素苷是影响花色的主要色素,二氢黄酮醇4-还原酶（DFR）基因是花色素苷合成的关键酶基因。本研究以云南地方彩色马铃薯品种‘剑川红’和‘转心乌’,外引品种‘黑美人’为实验材料,通过RT-PCR方法从其块茎表皮中克隆到DFR基因的完整cDNA序列,并进行了生物信息学分析。分析结果显示供试的三个彩色马铃薯的DFR基因编码381个氨基酸,具有完整的开放式阅读框（ORF）,DFR与NADPH的结合位点、底物特异性选择结合位点高度保守。同源比对表明,三个彩色马铃薯品种的核苷酸相似性为99.24%,氨基酸同源性为98.78%,与茄科的烟草、矮牵牛等的同源性均在86%以上。三个彩色马铃薯品种DFR都不具有信号肽,无明显跨膜区域,可能为亲水蛋白,定位于细胞质的可能性最高。α-螺旋和无规则卷曲是DFR的主要二级结构元件,DFR属于NADB-Rossmann superfamily。
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.007 | 0.003 |
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".