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.
Specific epithet means having narrow leaves. âMunsteadâ is a compact, early-flowering English lavender cultivar that was first introduced into commerce in 1916. It is a semi-woody perennial that typically grows to 12-18â tall and as wide. Lavender blue flowers appear in terminal spikes in late spring well into summer.nglish lavender varieties are more often used for culinary purposes than other types of lavender. This is a semi-woody plant that typically grows to 1.5-3â. Narrow, gray-green leaves (to 2 1/2â long) on square stems. Purple flowers appear in terminal spikes in late spring to early summer.