(1) An an initial stage in the study of proteins from thermophilic algae, the enzyme ribulose 1,5-bisphosphate carboxylase 2-phospho-D-glycerate carboxylyase (dimerizing, EC 4.1.1.39) was purified 11-fold from the thermophilic alga Cyandium caldarium, with a 24% recovery.
(2) The structures of 1 and 2 are closely related to the metabolites previously isolated from the alga Caulerpa prolifera.
(3) We have used two monoclonal antibodies to demonstrate the presence and localization of actin in interphase and mitotic vegetative cells of the green alga Chlamydomonas reinhardtii.
(4) Many other innovations are also being hailed as the future of food, from fake chicken to 3D printing and from algae to lab-grown meat.
(5) Dunaliella bardawil, a unicellular green alga that can be induced to accumulate massive amounts of beta-carotene, is particularly suitable for studies of carotenogenesis regulation and its links to developmental and adaptive processes in the chloroplast.
(6) Among the algae species studied, Falkenbergia rufolanosa is the most active in front of all the fungi tested.
(7) But the study’s co-author Mark Hay, a professor from the Georgia Institute of Technology, said the discovery here was that greater carbon concentrations led to “some algae producing more potent chemicals that suppress or kill corals more rapidly”, in some cases in just weeks.
(8) The light-induced turnover of P700 was measured spectrophotometrically in a wide variety of algae and some photosynthetic mutants.
(9) In excised regenerating peduncles algae divide before digestive cells, and at the onset of digestive cell division mitotic cells were found to contain almost twice the number of algae as before excision.
(10) Cell division in Euglena is compared with that of certain other algae.
(11) An enzyme was isolated from a eucaryotic, Chlorella-like green alga infected with the virus PBCV-1 which exhibits type II restriction endonuclease activity.
(12) The amoeba, however, could not use yeasts, molds, or a green alga as a nutritional source.
(13) The photochemical activities and fluorescence properties of cells, spheroplasts and spheroplast particles from the blue-green alga Phormidium luridum were compared.
(14) Free amino acid pools were examined for cultures of vegetative cells, gametes, and mature zygotes of the unicellular green alga Chlamydomonas reinhardtii (Dangeard).
(15) Crude ferredoxin preparations were obtained from blue-green algae, green algae, ferns, and higher plants.
(16) These organisms, typically bacteria or algae, are used to produce valuable commodities such as flavorings and oils.
(17) A pure culture of the green eukaryotic alga Chlorococcum sp.
(18) The alga may be defective in a regulatory mechanism that controls the reoxidation of reduced pyridine nucleotides formed during photosynthesis.
(19) Methods are described for preparation of pulse-labeled ribonucleic acid (RNA) from the blue-green alga Anacystis nidulans.
(20) Methyl-5(or 4)-(3,3-dimethyl-1-triazeno)-imidazole-4(or 5)-carboxylate was shown to have in vitro antimicrobial activity against gram-positive and gram-negative bacteria, yeasts, filamentous fungi, and algae.
Pyrenoid
Definition:
(n.) A transparent body found in the chromatophores of certain Infusoria.
Example Sentences:
(1) Immunoelectron microscopy shows that ubiquitin is located in the chloroplast, nucleus, cytoplasm, pyrenoid and on the plasma membrane.
(2) Where dilute the Fe-propionocarmine enhances nuclear staining without staining orthe organelles; where more concentration it also stains the nucleolus, spindle, spindle polar bodies, pyrenoid and protoplast.
(3) Similar results were obtained after chronic exposure to 4.9 x 10(-4) microM copper with the relative volume of the pyrenoid being 28% smaller than the controls.
(4) The presence of ribose-5-phosphate isomerase and ribulose-5-phosphate kinase activities was also noted in pyrenoid preparations.
(5) TMF-II consists mostly of thylakoid membranes still partially organized in grana; it contains also fragments of chloroplast envelope, pyrenoid tubules, and starch granules; thus it amounts to a fraction of chloroplast fragments which have lost practically all matrix components.
(6) The pyrenoid, when present, protrudes from the chloroplast, is also surrounded by the two chloroplast envelopes, and, in addition, is capped by a third dilated envelope or "pyrenoid sac."
(7) Both pyrenoids and fraction I protein are localized in the chloroplast, and both have two principal protein components.
(8) The English symbionts had a pyrenoid, compact chloroplast membranes and vesiculated polyphosphate bodies.
(9) Cells grown phototrophically without acetate possess more chloroplast ribosomes and have more normal membrane and pyrenoid organization.
(10) Cells grown mixotrophically in the presence of acetate have a highly disordered chloroplast membrane organization and usually lack pyrenoids.
(11) Statistical analysis of radioautographic grain distribution and measurements of different structural parameters indicate that (a) the chloroplast volume and surface remain constant during the process, whereas the growth of the photosynthetic lamellae parallels the increase in chlorophyll; (b) the lamellae do not develop from the chloroplast envelope or from the tubular system of the pyrenoid; (c) all the lamellae grow by incorporation of new material within preexisting structures; (d) different types of lamellae grow at different rates.
(12) For isolation of the nucleomorph, cells were slightly fixed with glutardialdehyde and thereafter, lysed by treatment with proteinase K and Triton X-100, leaving an intact nucleomorph-pyrenoid complex.
(13) The pyrenoid was found to contain a high specific activity of ribulose-1,5-diphosphate carboxylase which is the same enzymatic activity exhibited by fraction I protein.
(14) It is suggested that the pyrenoid contains fraction I protein and possibly other enzymes of the Calvin-Bassham carbon dioxide fixing pathway.
(15) Cytokinesis is accomplished by an annular median constriction causing the gradual separation of the chloroplast, pyrenoid, and other cell organelles, resulting in two equal daughter cells.
(16) In contrast, the relative volume of their pyrenoids decreased by 41.46%.
(17) Mixotrophic ac-20 cells are also characterized by low rates of photosynthetic electron transport, disorganized chloroplast membranes, and a small pyrenoid.
(18) The molecular weights and relative ratio of the two pyrenoid components are very similar to those of the two components of fraction I protein.
(19) In addition, the pyrenoid in synchronized cells has a transient existence, being present only in the first half of the light period.
(20) The ultraviolet absorption spectrum of sodium dodecyl sulfate (SDS) extracts of pyrenoids showed a single peak at a wavelength of 277 nm, indicating the presence of protein and the probable absence of nucleic acid.