INVESTIGADORES
PIGOZZI Maria Ines
artículos
Título:
First demonstration of the substructure of recombination nodules
Autor/es:
PIGOZZI MI; SOLARI AJ
Revista:
BIOCELL
Editorial:
INST HISTOL EMBRIOL-CONICET
Referencias:
Lugar: Mendoza; Año: 1998 vol. 22 p. 187 - 192
ISSN:
0327-9545
Resumen:
Recombination nodules are submicroscopic structures that are found in
all the sexually reproducing, eukaryotic organisms during the pachytene
stage of meiotic prophase I. Despite many reports on their number and
location, no definite substructure was previously reported in these
nodules. The present observations on spread oocytes and spermatocytes of
the pigeon, using an improved technique for protein preservation, shown
the presence of particulate subunits or "recombinomeres" in late
recombination nodules, besides an interparticle matrix. The number of
subunits per each nodule ranges from 1 to 5, and this number increases
with the advancement of pachytene substages. These subunits are present
in recombination nodules of all the other avian species previously
studied, and they may be present in other organisms as well. It is
suggested that the particulate substructure of recombination nodules
mirrors the multiplicity of multienzymatic complexes that are needed for
the ordered series of reactions that occur at the molecular level in
the sites of meiotic recombination.