(1) Here we report that sperm from psr males fertilizes eggs, but that the paternal chromosomes are subsequently condensed into a chromatin mass before the first mitotic division of the egg and do not participate in further divisions.
(2) These studies indicate that at each site of induction during feather morphogenesis, a general pattern is repeated in which an epithelial structure linked by L-CAM is confronted with periodically propagating condensations of cells linked by N-CAM.
(3) The propionyl-CoA condensing enzyme which catalyzes the first step in the biosynthesis of 2-methylbutyrate and 2-methylvalerate by Ascaris muscle appears to exist in at least three forms in the mitochondria of this parasitic nematode.
(4) Because the contour length of these loops was proportionate to the DNA content of the superinfecting lambda phage, it was concluded that the fibers contained DNA condensed 6.5-fold in blocks of about 250 base pairs.
(5) Allyl 4-O-benzyl-alpha-L-rhamnopyranoside was converted into allyl 4-O-benzyl-3-O-methyl-alpha-L-rhamnopyranoside and this was condensed with 2,3,4-tri-O-acetyl-alpha-L-rhamnopyranosyl chloride to give a disaccharide derivative which was converted into allyl 4-O-benzyl-2-O-(2,3-O-isopropylidene-alpha-L-rhamnopyranosyl)-3-O-methyl -alpha- L-rhamnopyranoside.
(6) Moderately dense fragments are interpreted as originating from dying cells in which the cytoplasm is undergoing condensation.
(7) In the scope of our research about the antimicrobial activity of aldehyde-amin-condensates a number of partly new unsymmetrically substituted animals was synthesized by reaction of formaldehyde with different secondary amines.
(8) They are thought to represent condensations of dense bodies in degenerating tumor cells.
(9) The blood lymphocytes were small with scanty cytoplasm, densely condensed nuclear chromatin, and deep clefts originating in sharp angles from the nuclear surface.
(10) The 2-substituted phenoxy-6-methoxy-8-aminoquinolines (4-6) were afforded by reduction of the corresponding 8-nitroquinolines (1-3) which were obtained by condensation of 2-chloro-6-methoxy-8-nitroquinoline and substituted phenols.
(11) Both main-stream and side-stream cigarette smoke condensates and some fractions, containing water-soluble bases, water-insoluble bases, and polycyclic aromatic hydrocarbons, were found to induce AHH activity in lung and liver, the lung being induced to the greatest extent.
(12) Ultrastructurally, transgenic domains were often intimately connected with constitutive heterochromatin and were highly condensed.
(13) This paper describes a new method of condensation (focusing) of extended volumes of mixtures of proteins (or other ampholytes) into an isoelectric spectrum of discrete zones located at points of a pH gradient corresponding to the pI value of the individual proteins.
(14) 4, 323-340, 1978) has a ts defect in its regulatory mechanism for the initiation of chromosome condensation, the so-called, premature chromosome condensation (PCC) being induced at a nonpermissive temperature (Nishimoto, T. et al.
(15) Chemical analysis of the smoke concensate of bidis and cigarettes showed that condensate from bidis had a higher benzo[a]pyrene level than was observed in cigarette smoke condensate, when compared on the basis of the mass (mg) burnt.
(16) On very rare occasions there is missorting such that aggregates of condensed secretory proteins and viruses occur together in post-Golgi vesicles.
(17) The reductions are carried out at the nanogram to microgram level with borane, reacting the solid sample with condensed reagent vapor.
(18) These data suggest that the main route for the formation of the carbon skeleton of aspartate was by a C(3) plus C(1) condensation, with the C(3) unit derived from the isopropyl carbons of valine and the C(1) unit probably from carbon dioxide.
(19) Once an apical hard tissue barrier is formed, a permanent root canal filling can be safely condensed.
(20) While the antiserum against gamma 3-MSH labelled all the secretory granules including intrasaccular condensations in the Golgi apparatus, antisera against alpha-MSH only labelled extra-Golgi secretory vesicles (SV).
Uncondensed
Definition:
Example Sentences:
(1) To influence for example the quantity and quality of RNA present at meiotic resumption (MR), we need access to uncondensed chromatin before that period.
(2) Electric dichroism and X-ray scattering measurements on solutions of uncondensed and condensed chicken erythrocyte chromatin were interpreted on the basis of model calculations.
(3) Our results lead us to propose a new hypothesis in which it is suggested that metaphase corresponds to the arrangement of condensed DNA bodies, or "chromosomes" around the MTOC and, through the assembly of microtubules, one set of uncondensed chromatin is displaced to the opposite pole of the nucleus, while the other remains condensed and associated to the original MTOC.
(4) Ultrastructural changes in the exocrine glands investigated included excessive accumulation of intracellular secretory material and formation of abnormal uncondensed secretion granules.
(5) In the uncondensed regions only very few fibrils laid loose loops are present, making it probable that only one fibril forms one chromatid.
(6) The authors suggested that the uncondensed heterochromatin may be more accessible to damage by mutagens.
(7) DNA is generally found within viruses and cells in a tightly packaged state, typically occupying only 10(-4)-10(-6) of the volume of the uncondensed DNA wormlike coil.
(8) Hence the transition from the uncondensed to the condensed state occurs as repulsion between the free DNA phosphates of erythrocyte chromatin is neutralised by bound cations.
(9) These cells show some resemblance to sperm or spermatids of sepioids and teuthoids (spheroidal acrosome, short nucleus) but are also remarkably similar to mid-spermatids of Octopus (with the exception of the uncondensed nucleus in Octopus spermatids).
(10) A JCA body was encountered in each of two dark cells with uncondensed secretory granules; one of these cells was from a specimen in which no other bodies could be found after an extensive search.
(11) Rifampin treatment also resulted in the uncondensing of isolated nucleoids and in an axial appearance of the nucleoids in ultrathin sections.
(12) However, antimonate deposits were localized in the condensed chromatin of the nucleus during random migration and associated to a large extent with the uncondensed nuclear chromatin during chemokinesis and chemotaxis.
(13) It is found that agreement between the calculated X-ray solution scattering patterns and the experimental observations can be reached with the assumptions that: a) The uncondensed chromatin fibre in solution has a helix-like structure, with a pitch of ca.
(14) Although AvaII and Sau96I readily attack the mouse major satellite in fixed chromosomes, BstNI and EcoRII do not normally do so, although if the heterochromatin is uncondensed as a result of culture in the presence of 5-azacytidine, BstNI can attack it.
(15) Electric dichroism measurements on a complex of uncondensed chromatin with methylene blue were made to determine the contribution of the linker and of the nucleosomes to the total dichroism.
(16) Cytological observations of the injected eggs show, in the arrested blastomeres, enlarged nuclei always surrounded by an intact nuclear envelope and containing uncondensed chromatin.
(17) Model calculations on the superstructure of uncondensed and condensed chromatin are presented.
(18) In the lymphocytes, isolated from females but not from males, one uncondensed G1-chromosome was detected among "pulverized" chromosomes which remained unlabeled with H3-thymidine.
(19) As in other vertebrate embryos, the first indication of mesodermal metamerism in this fish embryo is the occurrence of somitomeres, which are orderly, tandemly arranged units of uncondensed mesenchymal cells in the paraxial mesoderm.
(20) Similarly, both viral infection and spermatogenesis, where histones are replaced by protamines, involve transient formation of relatively uncondensed DNA species and subsequent packaging into extremely tight structures.