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RNA splicing is a process in molecular biology where a newly-made precursor messenger RNA (pre-mRNA) transcript is transformed into a mature messenger RNA ().It works by removing all the introns (non-coding regions of RNA) and splicing back together exons (coding regions).
Gene conversion is the process by which one DNA sequence replaces a homologous sequence such that the sequences become identical after the conversion. [1] Gene conversion can be either allelic , meaning that one allele of the same gene replaces another allele, or ectopic , meaning that one paralogous DNA sequence converts another.
Alternative splicing is regulated so that each mature mRNA may encode a multiplicity of proteins. Alternative splicing of the primary transcript. The effect of alternative splicing in gene expression can be seen in complex eukaryotes which have a fixed number of genes in their genome yet produce much larger numbers of different gene products. [9]
Alternative splicing, alternative RNA splicing, or differential splicing, is an alternative splicing process during gene expression that allows a single gene to produce different splice variants. For example, some exons of a gene may be included within or excluded from the final RNA product of the gene. [ 1 ]
Splice variants have been used to account for the relatively small number of protein coding genes in the human genome, currently estimated at around 20,000. One particular Drosophila gene, Dscam , has been speculated to be alternatively spliced into 38,000 different mRNAs , assuming all of its exons can splice independently of each other.
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 February 2025. Manipulation of an organism's genome For a non-technical introduction to the topic of genetics, see Introduction to genetics. For the song by Orchestral Manoeuvres in the Dark, see Genetic Engineering (song). For the Montreal hardcore band, see Genetic Control. Part of a series on ...
Trans-splicing is a special form of RNA processing where exons from two different primary RNA transcripts are joined end to end and ligated.It is usually found in eukaryotes and mediated by the spliceosome, although some bacteria and archaea also have "half-genes" for tRNAs.
Once both DNA molecules are extended in such a manner, they are mixed and a PCR is carried out with only the primers for the far ends. The overlapping complementary sequences introduced will serve as primers and the two sequences will be fused. This method has an advantage over other gene splicing techniques in not requiring restriction sites.