PRECURSOR RNA
\pɹɪkˈɜːsəɹ ˌɑːɹˌɛnˈe͡ɪ], \pɹɪkˈɜːsəɹ ˌɑːɹˌɛnˈeɪ], \p_ɹ_ɪ_k_ˈɜː_s_ə_ɹ ˌɑː_ɹ_ˌɛ_n_ˈeɪ]\
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RNA copies from DNA that exactly represent the genome sequence. This RNA cannot be used for producing protein until RNA splicing takes place. During this procedure the phosphodiester bonds at exon-intron boundaries are cleaved and the intron is excised. Consequently a new bond is formed between the ends of the exons. The resulting RNA is mature RNA which can be translated into protein.
By DataStellar Co., Ltd
Word of the day
Pyramidal Cells
- Projection neurons in cerebral cortex hippocampus. Pyramidal cells a pyramid-shaped soma with apex apical dendrite pointed toward pial surface and other dendrites an axon emerging from base. The axons may have local collaterals but also project outside their cortical region.