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Christmas Tree Pattern |
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Christmas Tree Pattern Dermatology A finding in pityriasis rosea; the lesions are oval, 1-cm pink-brown papules, covered by fine keratinaceous scales, which correspond to parakeratosis, and aligned parallel to the skin cleavage lines of the trunk; lesions fade after 2-12 wks Molecular biology Feathering pattern A descriptor for the ultrastructural pattern—seen by the technique of rotary shadowing after gene activation by DNA polymerase—when multiple pre-rRNAs simultaneously initiate transcription on a single DNA molecule. Each of the feather’s ‘branches’ corresponds to chains of nascent rRNA which are progressively shorter towards the initiation site Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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