(n.) A thread or threadlike object or appendage; a fiber; esp. (Bot.), the threadlike part of the stamen supporting the anther.
Example Sentences:
(1) Conditions consistent with a buildup of reduced flavoprotein, however, favored filament formation.
(2) Suspensions of isolated insect flight muscle thick filaments were embedded in layers of vitreous ice and visualized in the electron microscope under liquid nitrogen conditions.
(3) Ordering of these filaments into a parallel array is the basis of birefringence in the A region, and loss of birefringence is therefore a measure of decreased order.
(4) Structural studies indicate that caveolae are decorated on their cytoplasmic surface by a unique array of filaments or strands that form striated coatings.
(5) Accumulations of filaments in the axons and in the perineural cells were accompanied by Rosenthal fibres.
(6) Electron microscopic examination of all leptomeningeal and meningioma cultures revealed desmosomes and dense tonofilament formation; in addition, granular, filamentous basement membrane-like material was abundant in the extracellular spaces of all cultures.
(7) A new method of staining the keratin filament matrix allowing a visualization of the filaments in cross section of hair fibres has been developed.
(8) These force-generators are identified with projections (cross-bridges) on the thick filament, each consisting of part of a myosin molecule.
(9) In smooth muscles there is no organized sarcomere structure wherein the relative movement of myosin filaments and actin filaments has been documented during contraction.
(10) The results indicate that synthesis of lamellar bodies depends on an intact microtubular system, whereas secretion requires actin filaments in a functional state.
(11) The latter reaction is linked to a conformation change of the actin subunit that causes a destabilization of the actin-actin interactions in the filament, i.e., a structural change of the filament.
(12) In the capsule of the fibrocartilage cells, parallel orientated filaments exhibit a periodical arrangement.
(13) The images of 56 tubular myosin filaments of the fleshfly and 62 filaments of the housefly were digitized and computer processed by rotational averaging.
(14) It does not appear to react with the anti-IFA antibody, suggesting that it is not a member of the intermediate filament class of proteins.
(15) This suggests that cytokeratin 14 acts as an indiscriminate type I cytokeratin in filament formation in the established cell lines.
(16) Gene II protein is required for all phases of filamentous phage DNA synthesis other than the conversion of the infecting single strand to the parental double-stranded molecule.
(17) This supports the view that the pH is of no major importance for filamentation in vivo.
(18) Ultrastructural examination of a tumor with a typical cribriform pattern showed spaces of two types; the more frequent type was bounded by cells with straight plasma membranes and contained filamentous and basement-membrane-like material, and the less frequent type was surrounded by cells with numerous microvilli and contained nonfilamentous homogeneous material.
(19) The bright lines in the difference image represent the paths along which the filaments have moved and are measured using a crosshair cursor controlled by the mouse.
(20) Astrocytes showed a transitional swelling, later followed by an accumulation of glycogen and filaments.
Sericin
Definition:
(n.) A gelatinous nitrogenous material extracted from crude silk and other similar fiber by boiling water; -- called also silk gelatin.
Example Sentences:
(1) The onset of the symptoms, with regard to the various stages in the processing of silk, leads one to assume that the allergen involved is sericin.
(2) The sericin gene required more supercoiling for full transcription, whereas no preference for supercoiling was seen with the transcription of hsp70.
(3) Three protein binding sites have been identified in the upstream region of the sericin-1 gene.
(4) The 5' part of one sericin gene had been cloned and described by Okamoto et al.
(5) The UPE of the sericin-1-encoding gene, which is specifically expressed in the middle silk gland, also stimulates Ad2 MLP transcription in a similar manner.
(6) An allatectomy performed on fourth instar larvae promoted production of these mRNAs, suggesting that the synthesis of sericin mRNA is regulated by the titer of juvenile hormone.
(7) Templates containing multimerized SA or SC sites at -39 of the sericin-1 gene promoter were tested in MSG nuclear extracts.
(8) This explains, at least partially, the diversity of the sericins found in the cocoon.
(9) Using nuclear extracts from Bombyx mori middle silk glands (MSG) where the sericin-1 (Ser-1) mRNA is produced specifically, we have studied the in vitro transcription of the Ser-1 gene.
(10) When silk glands of the third instar larvae were transplanted into the abdomen of fifth instar larvae, substantial amounts of sericin mRNAs were induced in the transplant.
(11) The induced sericin gene activity was suppressed upon re-transplantation into the abdomen of fourth instar larvae and induced again when the second hosts grew up to fifth instar larvae.
(12) The sericin gene transcription is mostly restricted to the posterior region of the middle silk gland throughout the fifth larval instar.
(13) SGF-3 is present abundantly in the middle silk gland (MSG) where the sericin-1 gene is transcribed specifically but is also present in other cell types, though in a much less concentration.
(14) Since clusters of homeodomain binding sites can also be found in the promoters of other silk protein genes, the fibroin gene and the sericin-1 gene, these observations suggest a possible involvement of some homeobox genes in the regulation of a group of silk protein genes.
(15) In addition to quantitative adaptation of tRNAs to the composition of silk proteins (fibroin from the posterior silk gland, sericin from the middle part) and of iso-tRNAs from posterior silk gland to the major codons of fibroin mRNA, we also observe adaptation of tRNA from various tissues to the average amino acid content of proteins from fat body, gut, gonads and carcass of the silkworm.
(16) The components of the silk (fibroin and sericin) are also studied (molecular weight, composition).
(17) The middle silkgland cells also express another sericin gene (Ser2) which encodes two mRNA of 5.4 and 3.1 kb, also arising by differential splicing.
(18) Immunological investigations showed clearly that in this context sericin and also antigens from an insect of the genus anthrenus in the silk material are of allergenic importance.
(19) Promoters originating from insect genes, like the Bombyx sericin-1 gene, Drosophila hsp70 and Drosophila copia LTR, functioned as strong promoters in the embryos.
(20) The selective accumulation of tRNAs needed for decoding fibroin and sericin mRNAs which takes place during the Vth larval instar, cannot be explained by the occurrence of a preferential degradation of some tRNA species.