What is the Cry1Ac gene?
Cry1Ac protoxin is a crystal protein produced by the gram-positive bacterium, Bacillus thuringiensis (Bt) during sporulation. Cry1Ac is one of the delta endotoxins produced by this bacterium which act as insecticides. Transgenic Bt cotton initially expressed a single Bt gene, which codes for Cry1Ac.
What is the function of Cry1Ac gene?
Cry1Ac provides protection from feeding damage by target lepidopteran pests.
What is the cry1Ab gene?
The cry1Ab gene, driven by the maize ubiquitinpromoter, displayed certain kinds of spatial and temporal expression patterns under field conditions. The content of the Cry1Ab protein varied in different tissues of the main stems, the primary tillers and the secondary tillers.
What is Cry1Ac and Cry2Ab?
Abstract. Cabbage looper, Trichoplusia ni (Hübner) is an important lepidopteran pest on many vegetable and greenhouse crops, and some field crops. Although there are no commercial transgenic Bt vegetable or greenhouse crops, T. ni is a target of Bollgard II cotton, which produces Cry1Ac and Cry2Ab.
What is Bt toxin gene?
Bacillus thuringiensis (Bt), soil-dwelling bacterium that naturally produces a toxin that is fatal to certain herbivorous insects. Bt is also the source of the genes used to genetically modify a number of food crops so that they produce the toxin on their own to deter various insect pests.
What was the disease of the first person treated with gene therapy?
Related Stories. The first patient to be treated with gene therapy was a four year old girl treated at the NIH Clinical Center in 1990. She had a congenital disease called adenosine deaminase (ADA) deficiency which severely affects immunity and the ability to fight infections.
Where is cry1Ab from?
Genetically modified (GM) maize expressing the cry1Ab gene derived from the bacterium Bacillus thuringiensis (Bt) was first commercialized in 1996. In 2013, maize producing Cry1Ab was cultivated on millions of hectares in the Americas, South Africa, the Philippines, and Europe (mainly Spain) (James, 2013).
What organisms is the cry1Ab gene extracted?
Bacillus thuringiensis
In this study, the cry1Ab gene of previously characterized and Lepidoptera-, Diptera-, and Coleoptera-active Bacillus thuringiensis SY49-1 strain was cloned, expressed and individually tested on Ephestia kuehniella (Lepidoptera: Pyralidae) and Plodia interpunctella (Lepidoptera: Pyralidae) larvae.
What does Protoxin mean?
Protoxin meaning A precursor of a toxin. noun.
How does Bt corn affect humans?
Bacillus thuringiensis (Bt) is a soil bacterium that produces insecticidal toxins. There are no known adverse human health effects associated with Bt corn. Bt corn can adversely affect non-target insects if they are closely related to the target pest, as is the case with Monarch butterfly.
What does Bacillus thuringiensis do to humans?
Bt is low in toxicity to people and other mammals. Several studies have found no evidence of sickness or infection as a result of exposure. However, some products with Bt have caused eye and skin irritation. In one study, rats breathed in very high doses of concentrated Bt.