(n.) Any one of two or more distinct crystalline forms of the same substance; or the substance having such forms; -- as, carbonate of lime occurs in the allomorphs calcite and aragonite.
(n.) A variety of pseudomorph which has undergone partial or complete change or substitution of material; -- thus limonite is frequently an allomorph after pyrite.
Example Sentences:
(1) Allomorphic relationships in chickens selected for high or low juvenile body weight and their reciprocal crosses were examined from hatch to 56 days of age (doa).
(2) The H-2w homozygotes were then characterized by serological typing with monoclonal and polyclonal antibodies specific for the known allomorphs controlled by the class I H-2K and H-2D loci or the class II H-2A and H-2E loci.
(3) Controlled winding and stretching deformations are used to study how the two allomorphs and different base sequences absorb such external stress.
(4) This reduced fermentation rate was apparently due to the partial conversion of the cellulose from the type I to the type II allomorph, since mercerized (type II) cellulose was also fermented more slowly, and only after a much longer lag period.
(5) The in vivo site at which the different allomorphs of the E alpha Ia molecule exert their Ir gene effect on the immune response to pigeon cytochrome c was examined by creating two different sets of radiation-induced bone marrow chimeras.
(6) Allomorphic growth of organs and feed utilization were measured in cockerels from two meat lines known to differ in growth potential under alternate-day and daily feeding of diets differing in nutrient density.
(7) Allomorph (allele determined by electrophoresis) frequencies for 20 enzyme (loci) were calculated and 7 populations (Texas, Mexico, Belize, Guatemala, Ecuador [EC], Venezuela, and the Dominican Republic [DR]) were compared pairwise in the statistic of genetic identity (I) (level of genetic similarity).
(8) Sequencing of the PCR products and transfection of these to Fc gamma R- cells indicated that in Fc gamma RIIa of HR or LR individuals: (i) three nucleotide substitutions (CA to TG and G to A) resulted in the change of glutamine to tryptophan at position 27 (first extracellular domain) and arginine to histidine at position 131 (second extracellular domain); (ii) expression of cDNA encoding the various combinations of these indicated that arginine at position 131 was essential for IgG1 binding whereas the amino acid changes at position 27 had no effect; and (iii) IgG1 at high concentration bound to all allomorphic forms of Fc gamma RIIa.
(9) In addition, the 'logic' of assuming Contrast leads to insurmountable difficulties in the acquisition of irregular forms and allomorphs.
(10) Thus, it is unlikely that these enzymic variants reflect allomorphic forms of P-450 3b.
(11) The allomorph obtained by this process seems to correspond to the so-called 'tendon-chitosan'.
(12) Limiting dilution analysis confirmed a number of antigenic relationships suggested by the long-term T cell clones and revealed that T cells specific for allomorphic protease determinants were at least as frequent in the blood of immune donors as were T cells committed to conserved determinants.
(13) Lutzomyia youngi Feliciangelis and Murillo and L. spinicrassa Morales, Osorno, Osorno, and Hoyos each have diagnostic allomorphs for phosphogluconate dehydrogenase (6PGDH) and fumarate hydratase (FUM).
(14) These clones defined five AP and three E specificities and suggested the existence of at least five allomorphic determinants expressed on the proteases of various Pseudomonas strains.
(15) Heterozygotes of hexokinase-1 and phosphoglucomutase displayed 2 allomorphs in equal dosage, indicating that trichomonads are diploid for these protein loci.
(16) A diagrammatic representation of the allomorphs among the 72 isolates is included.
(17) When isolated, the two major bands again produced an "isoelectric spectrum" suggesting that it reflects an allomorphism of cx-flagellin.
(18) With respect to the coupling factor's ability to hydrolyze ATP, the data in this study suggest that there are at least four distinct functional allomorphs of this enzyme: (1) the latent enzyme, which has no kinetically measurable ATPase activity, (2) intrinsic ATPase, which is catalyzed by a small percentage of the molecular population that has been activated by some natural mechanism, (3) activated ATPase, which has properties different from those of intrinsic ATPase, and (4) aged activated ATPase, in which some of the properties (Km for substrate, sensitivity to deactivation by Mg2+ and H+) spontaneously change within 30 min.
(19) Thus, we assume that they are stable conformational isomers of the proteins (allomorphism) or that there are only slight variations in the internal sequences of these proteins (polymorphism) causing distinct pIs.
Crystalline
Definition:
(a.) Consisting, or made, of crystal.
(a.) Formed by crystallization; like crystal in texture.
(a.) Imperfectly crystallized; as, granite is only crystalline, while quartz crystal is perfectly crystallized.
(1) In addition to the phase diagrams reported here for these two binary mixtures, a brief theoretical discussion is given of other possible phase diagrams that may be appropriate to other lipid mixtures with particular consideration given to the problem of crystalline phases of different structures and the possible occurrence of second-order phase transitions in these mixtures.
(2) In 0.17 M Na+(aq), tRNA(Phe) exists in its native conformation and the number of strong binding sites (Ka greater than or equal to 10(4)) was estimated to be 3-4 by titration experiments, in agreement with X-ray structural data for crystalline tRNA(Phe) (Jack et al., 1977).
(3) Electron microscopy revealed the presence of a hitherto unreported peculiar "pilovacuolar" inclusion in numerous mitochondria, composed of an electron dense pile or rod within a vacuole, while globular or crystalline inclusions were absent.
(4) The advantages of the incision through the pars plana ciliaris are (1) easier approach to the vitreous cavity, (2) preservation of the crystalline lens and an intact iris, and (3) circumvention of the corneal and chamber angle complications sometimes associated with the transcorneal approach.
(5) These two crystallins were compared with respect to their native molecular masses, subunit structures, peptide mapping and amino acid compositions in order to establish the identity of each crystallin.
(6) Freeze-dried mannitol preparations were shown to be of a crystalline nature.
(7) Antigenic properties of crystalline pepsin, trypsin and chymotrypsin were studied in 9 rabbits immunised with these enzymes.
(8) X-ray diffraction spectrum of 1:8 coprecipitate (COPPT) showed no crystalline structure of AD.
(9) However, significant differences in the formation and melting of the highly crystalline phase were evident between the two polar headgroup stereoisomers.
(10) Degradation studies of the crystalline antibiotic, m.p.
(11) Crystalline derivatives of the amino sugar i. e. methyleremosaminide and methyl-N,O-acetyleremosaminide (alpha- and beta-anomers) were prepared.
(12) A systematic structural comparison of several carp gamma-crystallins with high methionine contents was made by the secondary-structure prediction together with computer model-building based on the established X-ray structure of calf gamma-II crystallin.
(13) The lens cell-free system synthesizes in addition to the crystallins, polypeptides which co-electrophorese with lens plasma membrane protein components.
(14) Arrhenius plots of the leakage rates showed breaks in the 20-25 degrees C temperature range, which correspond to the gel-liquid crystalline phase transition of the target liposomes.
(15) These results suggest that ATP modulates the functional behavior of alpha-crystallin.
(16) Because anesthetics transform the solid-gel membrane into a liquid-crystalline state, and because phospholipid membranes display an anomaly in permeability at the phase transition, dimyristoylphosphatidylcholine vesicles were studied at temperatures above the main phase transition to avoid this anomaly.
(17) By monitoring the synthesis of specific lens crystallin proteins, and the morphological and cellular changes associated with this differentiated system, we have demonstrated a close correlation between statin expression and cell commitment to the G0 nonreplicative cell cycle state.
(18) Developmental regulation of crystallin protein synthesis was observed in rat lenses between embryonic day 19 and postnatal day 21.
(19) Bovine lens calf gamma-II crystallin contains five histidine residues at sequence positions 14, 53, 84, 117, and 122.
(20) A second crystalline material was observed within cells in the 15,000 X g pellet from spinal fluid.