{"refrec":{"BRefID":262048,"RR":"<b>Van Daele, Y.; Revol, J.-F.; Gaill, F.; Goffinet, G.</b> (1992). Characterization and supramolecular architecture of the cellulose-protein fibrils in the tunic of the sea peach (<i>Halocynthia papillosa</i>, Ascidiacea, Urochordata). <i>Biol. Cell. 76(1)</i>: 87-96. <a href=\"https://dx.doi.org/10.1016/0248-4900(92)90198-A\" target=\"_blank\">https://dx.doi.org/10.1016/0248-4900(92)90198-A</a>","BEntID":254067,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Biol. Cell. 76(1)</i>: 87-96. <a href=\"https://dx.doi.org/10.1016/0248-4900(92)90198-A\" target=\"_blank\">https://dx.doi.org/10.1016/0248-4900(92)90198-A</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Van Daele, Y.; Revol, J.-F.; Gaill, F.; Goffinet, G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Van Daele, Y. <i>et al.</i>","Englishabstract":"The cellulose-protein fibrils, which constitute by far the bulk of the fibrous fraction of the sea peach tunic (<i>Halocynthia papillosa</i>), were structurally and chemically characterized, either <i>in situ</i> or after extraction procedures, with the use of classical electron microscoy combined with diffraction contrast imaging and electron diffraction, histochemistry, affinity cytochemistry and chemical analysis. These fibrils exhibit a cross-sectional shape close to a parallelogram. The cyrstallites forming their core, with lateral dimensions ranging from roughly 5 to 20 nm, are composed of native cellulose of higher crystallinity than that of plant cellulose. They are associated with acid mucopolysaccharidés (amps) and proteins which form a coating material appearing as a continuous sheath enveloping the axial crystallite in the cuticular layer or as patches more-or-less periodically distributed around and along the fibre axis in the fundamental layer. Tunicin, the alkali-insoluble fibrous fraction, is not pure cellulose, yielding only 22–60% of its dry weight as glucose equivalents, depending on the tunical layer. It is suggested that in addition to the high degree of crystallinity of the tunical cellulose, the presence of a significant amount of coating material composed of amino acids and proteoglycans firmly linked to cellulose molecules contributes to tunicin's high resistance to hydrolysis.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Characterization and supramolecular architecture of the cellulose-protein fibrils in the tunic of the sea peach (<i>Halocynthia papillosa</i>, Ascidiacea, Urochordata)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-21 01:32:24.891995","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"TUNICATE; TUNICIN; CELLULOSE; HALOCYNTHIA; ASCIDIAN","OtherDescriptors":null,"Notes":null,"AnaPub":1992,"MonPub":null,"DateUpdate":"2022-05-10","DateCreate":"2016-10-03","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1992KK21900010","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/0248-4900(92)90198-A"},"refs":null,"anarec":{"AnaID":262048,"PubliDate":1992,"Pagination":"87-96","XtraPublOfAnaID":null,"ISBN":null,"Volume":"76","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42263,"SerRR":"Biology of the cell. 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