Ca<sub>v</sub>3 T‐type calcium channels
Bibliographic record
Abstract
Abstract T‐type channels are unique among the voltage‐gated calcium channels in their fast kinetics and low voltages of activation and inactivation, the latter two features allowing them to operate at voltages near the resting membrane potential of most neurons. T‐type channels can therefore be recruited by subthreshold depolarizations, and hyperpolarizations that remove inactivation. As such, T‐type channels can significantly influence how and when cells reach action potential threshold, and thus are critical regulators of excitability. T‐type channels are also significantly conserved within the animal kingdom, present even in animals lacking muscles and nerves, suggesting that they evolved before or very early on during the emergence of neuronal and neuromuscular synapses. Physiologically, T‐type channels are involved in multiple processes, and their contributions range from purely electrogenic roles to the activation of calcium‐sensitive ion channels, signaling pathways, and other macromolecular complexes. Unfortunately, it has been difficult to prove sufficiency and necessity of T‐type channels in many of these processes, in part due to inconsistencies in their suspected contributions. Furthermore, gene knockout studies have failed to show that T‐type channels are essential for development or survival, as knockout animals exhibit only weak phenotypes. T‐type channels roles are likely dependent on cellular context, and the three mammalian isotypes are expected to be somewhat redundant in their functionality, but have evolved from the single ancestral precursor gene in invertebrates to carry out unique functions, as evidenced by their divergent biophysical properties and protein–protein interaction motifs present within cytoplasmic regions.WIREs Membr Transp Signal2012, 1:467–491. doi: 10.1002/wmts.41 For further resources related to this article, please visit the WIREs website .
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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 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.013 | 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".