Lambda Repressor. The repressor molecule of the Lambda bacteriophage binds not only to the OR1 site to prevent Cro transcription, but also to OR2, where it aids the binding of RNA polymerase to the repressor promoter. In fact a repressor dimer bound to OR1 interacts cooperatively with a second dimer binding to OR2.
Mandevillas grow as tropical perennials in frost-free regions. When looking for an attractive, blooming tropical vine, don't overlook mandevillas (Mandevilla spp.). These lovely climbing vines have abundant and showy blossoms that are produced for a period of several months.n these areas, mandevilla vines can reach a height of 10 to 20 feet, with older stems becoming woody and thick. In parts of zone 8 where winter frosts might occur, mandevillas planted outdoors often die back to the ground but regrow from surviving roots the next spring.
Malva is a genus of about 25â30 species of herbaceous annual, biennial, and perennial plants in the family Malvaceae (of which it is the type genus), one of several closely related genera in the family to bear the common English name mallow. number of species, previously considered to belong to Lavatera, have been moved to Malva. The leaves are alternate, palmately lobed. The flowers are from 0.5â5 cm diameter, with five pink or white petals. The colour mauve was in 1859 named after the French name for this plant.