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The Vertebrate Trait Ontology (VT) is being developed as a collaborative effort between the Rat Genome Database at the Medical College of Wisconsin (RGD,, Mouse Genome Informatics at the Jackson Laboratory ( and the Animal QTL database at Iowa State University ( For more information about this vocabulary, or to request additions or changes, please contact us (

Term:smooth muscle morphology trait
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Accession:VT:0000767 term browser browse the term
Definition:Any measurable or observable characteristic related to the shape, structure, color, or pattern of any of the unstriated, involuntary muscle tissue of the internal organs, blood vessels, and other body structures not under willful control.

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blood vessel smooth muscle cell quantity term browser
Symbol Object Name Evidence Notes Source PubMed Reference(s) RGD Reference(s) Position
Q Smcn1 Smooth muscle cell number QTL 1 IDA RGD PMID:15741507 RGD:1357419 NCBI chr 2:59,134,147...127,460,910 JBrowse link

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  vertebrate trait 2384
    organ system trait 1553
      muscular system trait 2
        muscular system morphology trait 2
          smooth muscle morphology trait 1
            blood vessel smooth muscle morphology trait + 1
            esophageal smooth muscle morphology trait 0
            intraocular muscle morphology trait 0
            tracheal smooth muscle morphology trait 0
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