major dense line


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Related to major dense line: intraperiod line

major dense line

In electron microscopic images of myelin sheaths, the compacted cytoplasmic side of the Schwann cell membranes, which alternates in multiple layered sheaths with tightly opposed external membrane surfaces called the minor dense line or the intraperiod line.
Synonym: period line See: intraperiod line
See also: line
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