| Studies on silk secretion in the Trichoptera (F. Limmephilidae). II. Structure and amino acid composition of the silk. | |
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MedLine Citation:
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PMID: 1277288 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The ultrastructure and amino acid composition of the secreted silk of two species of trichopteran larvae, Pycnopsyche guttifer (Walk.) and Neophylax concinnus McL., were investigated. The spinnerets of these two animals were also examined by scanning electron microscopy. The silk consists of double-stranded, flat ribbons (1-4 mu wide), composed of bundles of 15-25 A filaments. There are two components of the silk: the fiber proper and a surrounding coat thought to be a silk "gum". Only the outer coat is positive to the EM PATP technique of Thiery (1967), which indicated the presence of neutral sugars. Amino acid analyses of Pycnopsyche silk show that, like other silks, two predominant amino acids are glycine and serine. Arginine, unexpectedly, is the third most abundant and there are a large number of basic and long side-chain amino acids. X-ray diffraction studies of the silk indicate that it has a less crystalline, more amorphous structure than that of other silks. |
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Authors:
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M S Engster |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Cell and tissue research Volume: 169 ISSN: 0302-766X ISO Abbreviation: Cell Tissue Res. Publication Date: 1976 Jun |
Date Detail:
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Created Date: 1976-09-02 Completed Date: 1976-09-02 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0417625 Medline TA: Cell Tissue Res Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 77-92 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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analysis* Animals Fibroins / analysis Insects* Microscopy, Electron Protein Conformation Proteins* / analysis X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Proteins; 9007-76-5/Fibroins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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