摘要:
An artificial promoter characterized for been a chimerical recombinant DNA molecule such that, when introduced in any class of plant cells, promotes high expression levels of any DNA molecule fused to its 3′ end. The basic genetic elements of the molecule described here are: a core promoter with a consensus TATA box, followed by an Exon/Intron/Exon region and a translation enhancer element, all of them artificially constructed. Transcription regulatory elements can be inserted upstream of the promoter here described to confer temporal-, organ- or tissue-specificity to the expression. The designed artificial genetic elements can be functionally inserted between any promoter active in plant cells and any DNA sequence to increase its transcription/translation levels.
摘要:
Generation of genetic constructions based on modified fragments of the hepatitis A virus (HAV) genome, using the strain M2, isolated in Cuba. Nucleotides sequences of these fragments fused to the appropriated localization and regulation signals, are expressed in transgenic plant. The obtained recombinant antigens of the HAV are composed of pentamers and/or empty envelope, able to develop immune response.
摘要:
A fully enclosed toy craft intended for both amusement and educational purposes having the ability to assume a multitude of forms with each form resembling a different type of vehicle. The craft's interior resembles a scaled down version of a commander's cabin in a real craft and includes, among other things, audio visual material, calculating apparatus, and an assortment of readout or instrumentation devices. In addition, an analog computer interacting with various items in the commander's cabin, in response to stimuli provided by the operator moving hand or foot control devices gives the operator the illusion of being in control of a real craft.