Autor: Bielecki, Andrzej. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Isoenzymes of N-acetyl-β-hexosaminidase in complicated pregnancy
Autorzy:: Arciuch, Leszek
Bielecki, Dariusz
Borzym, Małgorzata
Południewski, Grzegorz
Arciszewki, Krzysztof
Różański, Andrzej
Zwierz, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/1044458.pdf
Data publikacji:: 1999
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: pregnancy
placenta
N-acetyl-β-hexosaminidase
isoenzymes
Opis:: The activity of N-acetyl-β-hexosaminidase was found to be significantly higher in the placentas collected after delivery from women in puerperium with symptoms of prolonged pregnancy or complicated by EPH gestosis, than in placentas from normal pregnancy. Isoelectrofocusing of placenta homogenates showed the presence of isoenzymes A, P and B of N-acetyl-β-hexosaminidase. Different isoenzyme A patterns in homogenates were observed in placentas obtained from normal and prolonged pregnancies and in those complicated by EPH gestosis.
Źródło:: Acta Biochimica Polonica; 1999, 46, 4; 977-983
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Molecular basis of cellulose biosynthesis disappearance in submerged culture of Acetobacter xylinum
Autorzy:: Krystynowicz, Alina
Koziołkiewicz, Maria
Wiktorowska-Jezierska, Agnieszka
Bielecki, Stanisław
Klemenska, Emilia
Masny, Aleksander
Płucienniczak, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/1041378.pdf
Data publikacji:: 2005
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: 2-D electrophoresis
UDP-glucose pyrophosphorylase
phosphoglucomutase
bacterial cellulose
Acetobacter xylinum
PCR-MP
Opis:: Acetobacter xylinum strains are known as very efficient producers of bacterial cellulose which, due to its unique properties, has great application potential. One of the most important problems faced during cellulose synthesis by these bacteria is generation of cellulose non-producing cells, which can appear under submerged culture conditions. The reasons of this remain unknow. These studies have been undertaken to compare at the molecular level wild-type, cellulose producing (Cel+) A. xylinum strains with Cel- forms of cellulose-negative phenotype. Comparison of protein profiles of both forms of A. xylinum by 2D electrophoresis allowed for the isolation of proteins which were produced exclusively by either Cel+ or Cel- cells. Sequences of peptides derived from these proteins were aligned with those of proteins deposited in databases. This analysis revealed that Cel- cells lacked two enzymes: phosphoglucomutase and glucose-1-phosphate uridylyltransferase, which generates UDP-glucose being the substrate for cellulose synthase. DNA was analyzed by ligation-mediated PCR carried out at low denaturation temperature (PCR-MP). Two DNA fragments of different thermal stability (218 and 217 bp) were obtained from the DNA of Cel+ and Cel- forms, respectively. The only difference between these Cel- and Cel+ DNA fragments is deletion of one T residue. Alignment of those two sequences with those deposited in the GenBank database revealed that similar fragments are present in the genomes of some bacterial cellulose producers and are located downstream from open reading frames (ORF) encoding phosphoglucomutase. The meaning of this observation is discussed.
Źródło:: Acta Biochimica Polonica; 2005, 52, 3; 691-698
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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