S1 satellite DNA repetitive units display identical structure and overall variability in all Anatolian brown frog taxa.

S1 satellite DNA from Palearctic brown frogs has a species-specific structure in all European species. We characterized S1 satellite DNA from the Anatolian brown frogs Rana macrocnemis, R. camerani, and R.

An ancient satellite DNA has maintained repetitive units of the original structure in most species of the living fossil plant genus Zamia.

ZpS1 satellite DNA is specific to the genus Zamia and presents repetitive units organized as long arrays and also as very short arrays dispersed in the genome. We have characterized the structure of the ZpS1 repeats in 12 species representative of the whole geographic distribution of the genus. In most species, the clone most common sequences (cMCS) were so similar that a general most common sequence (GMCS) of the ZpS1 repetitive unit in the genus could be obtained.

Multiple and different genomic rearrangements of the rbcL gene are present in the parasitic orchid Neottia nidus-avis.

In parasitic plants that have lost most, if not all, of their photosynthetic genes, the genome of their plastids has also undergone a dramatic reduction. For example, photosynthetic genes, such as rbcL, frequently become pseudogenes, in which large portions of the gene have been found to be deleted. Orchids are flowering plants with several parasitic lineages.

Structure and population dynamics of the major satellite DNA in the red flour beetle Tribolium castaneum.

In the beetle genus Tribolium, satellite DNAs comprise a significant amount of pericentromeric heterochromatin and are characterized by rapid turnover resulting in species specific profiles. In the present work we characterize the major pericentromeric satellite DNA TCAST of the beetle T. castaneum and analyse its population dynamics.

Unusual chromosomal distribution of a major satellite DNA from Discoglossus pictus (Amphibia, Anura).

A new highly abundant satellite DNA from Discoglossus pictus (Dp-sat1) was isolated and characterized. The repetitive unit (0.51 kb) has 2 HindIII sites and only one SpeI site: digestion of genomic DNA with HindIII produces 3 fragments: HA (0.