Forum eportal / edycja

Temat: drzewo ewolucyjne sciete
...chromalveolates, rhizarians, haptophytes and cryptomonads, thus linking nearly all photosynthetic lineages and raising the question of a possible unique origin of plastids. At its deepest level, the tree of eukaryotes now receives strong support for two monophyletic megagroups comprising most of the eukaryotic diversity. Merchant SS i wsp.: The Chlamydomonas genome reveals the evolution of key animal and plant functions. Science 2007 Oct 12; 318(5848): 245-50. Chlamydomonas reinhardtii is a unicellular green alga whose lineage diverged from land plants over 1 billion years ago. It is a model system for studying chloroplast-based photosynthesis, as well as the structure, assembly, and function of eukaryotic flagella (cilia), which were inherited from the common ancestor of plants and animals, but lost in land plants. We sequenced the approximately 120-megabase nuclear genome of Chlamydomonas and performed...
Źródło: topranking.pl/1815/drzewo,ewolucyjne,sciete.php



Temat: Kolejny raz....
...(tzw. trans-splicing, czyli skladanie RNA z oddzielnie | transkrybowanych prekursorów). Tylko w mt czy u roslin w ogole wszedzie, w jadrze i chloroplastach tez? U Stryera bodajze czytalam, ze podobny mechanizm jest tez w mt grzybow... Na pewno nie tylko u roslin i nie tylko w mtDNA. Stwierdzono w chloroplastach (np. Rivier C, Goldschmidt-Clermont M, Rochaix JD. "Identification of an RNA-protein complex involved in chloroplast group II intron trans-splicing in Chlamydomonas reinhardtii.",EMBO J 2001 Apr 2;20(7):1765-73), a takze w genach jadrowych Metazoa (np. Stover NA, Steele RE "Trans-spliced leader addition to mRNAs in a cnidarian", Proc Natl Acad Sci U S A 2001, 98:5693-98). Medline powie Ci jeszcze duzo wiecej ;-)         Pozdrawiam         Pawel
Źródło: topranking.pl/1816/kolejny,raz.php


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