Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Induction to erythroid differentiation of K 562 cells by 1-β-D-arabinofuranosylcytosine is inhibited by iron chelators: reversion by treatment with hemin (1988)
    Springer
    Annals of hematology 57 (1988), S. 25-30 
    Details
    ISSN: 1432-0584
    Keywords: K 562 cells ; Erythroid differentiation ; Hemin ; Iron chelators
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Erythroid differentiation of human leukemic K 562 cells is inhibited by the iron chelator desferrioxamine (DF). In addition, desferrioxamine induces an increase of uptake of hemin. When hemin is added to the culture medium, the DF-mediated inhibitory effects on erythroid induction are reversed. Briefly, hemin allows hemoglobin synthesis by K 562 cells induced to erythroid differentiation by 1-β-D-arabinofuranosylcytosine (ara-C) and treated with 12.5 μg/ml DF. In addition, it was found that hemin treatment leads to a reversion of inhibition of K 562 cell proliferation mediated by 50–75 μg/ml DF. This effect of hemin was also detected in other cultured human tumor cell lines (B-lymphoid, erythroleukemic and from breast carcinomas, melanomas and kidney carcinomas).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00320631
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    High heterochromatin content in somatic chromosomes of two unrelated species of Diplopoda (Myriapoda) (1997)
    Springer
    Chromosome research 5 (1997), S. 407-412 
    Details
    ISSN: 1573-6849
    Keywords: Acanthopetalum sicanum ; chromosome banding ; Diplopoda ; Enologus oxypygum ; heterochromatin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract For the first time, a conventional analysis of C-banded karyotypes was carried out in two distantly related diplopod species; this revealed an impressive percentage of heterochromatin in both genomes. In Acanthopetalum sicanum (Order Callipodida) (2n = 12), heterochromatin constitutes about 60% of the total DNA in females and 56% in males, whereas in Enologus oxypygum (Order Julida) (2n = 22) it is about 67% in both sexes. Heterochromatin of the two species was found to be similar in base composition (AT rich) and heterochromatin distribution, indicating that it has accumulated in a species-specific manner. Sex-determining mechanisms of the XY type were detected in both A. sicanum and E. oxypygum. In A. sicanum, the Y presented the lowest heterochromatic content of all chromosomes in the karyotype, whereas the X presented the highest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018400510064
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    18S-28S rDNA is interspersed throughout heterochromatin in the millepede Enologus oxypygum (Diplopoda) (2000)
    Springer
    Genetica 110 (2000), S. 151-155 
    Details
    ISSN: 1573-6857
    Keywords: chromosomes ; diplopoda ; Enologus oxypygum ; FISH ; heterochromatin ; invertebrate ; rDNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In the present study, somatic metaphase chromosomes of the millipede Enologus oxypygum (Diplopoda: Julida) were hybridized in situ with a sea urchin (Echinodermata) ribosomal probe (prRl4) in order to map major RNA genes (rDNA). Chromosomal preparations were also silver stained (Ag-NOR) to evaluate the rDNA transcriptional activity. Our results indicate that RNA genes are throughout heterochromatin in eight chromosomes involving 1/4 of the total heterochromatin which, in this species, is about 67% of the total DNA. Ag-NOR and FISH patterns were not coincident.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017928826304
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...