Abstract: A purine or pyrimidine analog having a reactive moiety not normally present in RNA is incorporated into RNA during a defined time period in a cell of interest, where the cell of interest comprises a phosphoribosyltransferase or nucleoside kinase that can specifically incorporate the analogs into the corresponding nucleotide. The nucleotide is then retained by the cell until it is synthesized in RNA. The labeled RNA can be specifically purified away from all other molecules and finds use in hybridization to microarrays; hybridization to blots; real time PCR; reverse transcriptase PCR, in vitro translation; cross-linking to interacting molecules, and the like.

Abstract: A method is provided for multiplying the number of copies of a target polynucleotide sequence comprising a series of primer hybridization, extending, and denaturing steps to provide an intermediate double-stranded DNA molecule containing a promoter sequence (through the use of a promoter-sequence-containing primer) incorporated upstream from the target sequence. The double-stranded DNA intermediate is then used to grow multiple RNA copies of the target sequence. The resulting RNA copies can be used as target sequences to produce further copies. Multiple cycles of this sort can thereby exponentially increase the number of target sequence copies.

Abstract: A method is provided for multiplying the number of copies of a target polynucleotide sequence comprising a series of primer hybridization, extending, and denaturing steps to provide an intermediate double-stranded DNA molecule containing a promoter sequence (through the use of a promoter-sequence-containing primer) incorporated upstream from the target sequence. The double-stranded DNA intermediate is then used to grow multiple RNA copies of the target sequence. The resulting RNA copies can be used as target sequences to produce further copies. Multiple cycles of this sort can thereby exponentially increase the number of target sequence copies.

Abstract: Genetic material encoding p30 and B1 peptides of Toxoplasma gondii has been isolated and characterized. This genetic material allows the production of peptides for use in diagnosis or immunization or can itself be directly used in hybridization assays.