| Term: | motor neuron Cajal body |
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| Note: | This page represents a term created by the combination ("post-composition") of two ontology terms. For more information on the individual terms, click the hyperlinked name. |
| Name: | motor neuron |
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| Synonyms: | motoneuron |
| Definition: | An efferent neuron that passes from the central nervous system or a ganglion toward or to a muscle and conducts an impulse that causes movement. |
| Ontology: | Anatomy Ontology [ZFA:0009052] |
| Name: | Cajal body |
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| Synonyms: | coiled body, Gemini of coiled bodies, Gems |
| Definition: | A class of nuclear body, first seen after silver staining by Ramon y Cajal in 1903, enriched in small nuclear ribonucleoproteins, and certain general RNA polymerase II transcription factors; ultrastructurally, they appear as a tangle of coiled, electron-dense threads roughly 0.5 micrometers in diameter; involved in aspects of snRNP biogenesis; the protein coilin serves as a marker for Cajal bodies. Some argue that Cajal bodies are the sites for preassembly of transcriptosomes, unitary particles involved in transcription and processing of RNA. |
| Ontology: | GO: Cellular Component [GO:0015030] QuickGO AmiGO |