Article Abstract:
Molecular models for the expression of self-incompatibility in plants are developed. Self-incompatibility in plants is genetically controlled by the highly allelic S-locus which acts as an intraspecific barrier that prevents self-fertilization as well as fertilization by genetically related individuals. Research indicates that the S-locus encodes either a single gene expressed in pollen and pistil, or two genes, one expressed in the pistil and the other in pollen.
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Article Abstract:
The termination of ribonucleic acid translation is mediated by polypeptide release factors (RFs) such as codon-specific RF-1 or RF-2 in prokaryotes and non-specific eRF-3 or eRF-1 in eukaryotes. Mutations in the pfrB gene that promote the synthesis of bacterial RF proteins cause increased frequency of frameshifts and misreading of stop signals in the cells. Furthermore, the site and structure of eukaryotic RFs are distinct from their prokaryotic counterparts.
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Article Abstract:
In vivo and in vitro studies help understand certain molecular mechanisms involved in skeletal development at different integrated levels of organizations, controlled by single gene products. The skeleton body plan and the shape of its elements are designed according to the pattern information, while the position information controls internal bone structure. The three main cell types present in the skeleton are chondrocytes, osteoblasts and osteoclasts.
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