The heterogeneous nuclear RNA
(hnRNA)molecules synthesized by the polymerase
have a characteristic “cap” at their 5!
end and a polyadenine “tail” (A–A–A–.. .) at the
3! end (!D). Once synthesized, they are immediately
“enveloped” in a protein coat, yielding
heterogeneous nuclear ribonucleoprotein
(hnRNP) particles.The primary RNA or premRNA
ofhnRNA contains both coding
sequences (exons) and non-coding sequences
(introns).
原帖由 dolphin_ice 於 11/7/2008 12:26 發表
PremRNA OF hnRNA?
我查Wikipedia可在說hnRNA就是PremRNA!
http://en.wikipedia.org/wiki/HnRNA
會否像cytosol 和cytoplasm般是易混淆字?
如是者, 分別是?
還是只是打錯字, 把or 打成of?
Wikipedia is a good place to start your research/ finding, but it must NOT be your terminal.
原帖由 fish 於 11/7/2008 02:06 PM 發表
由於絕大多數hnRNA 都是 pre-mRNA,所以在某程度上交換來用的問題不大
(hnRNA vs pre-mRNA 比cytosol VS cytoplasm的分別更細微啦)
defn:
http://www.biochem.northwestern.edu/holmgren/Glossary/Definiti ...
A diverse assortment of RNA types found in the nucleus, including mRNA precursors (pre-mRNA) and other types of RNA.
原帖由 dolphin_ice 於 11/7/2008 15:25 發表
不知如何查得為何叫 heterogeneous nuclear mRNA呢?
它和 heterogeneous又有何relationship? (nuclear 是因為它的位置在nuclei 裡嗎?)
何時變成pre-mRNA, 還是 pre-mRNA是hnRNA的一種?
另外,
求.pdf format 的Medical Biochem, bacteriology, virology, parasitology
不知哪裡可以download呢? :p
你有讀這些嗎?
原帖由 fish 於 11/7/2008 03:53 PM 發表
沒想過heterogeneous 的由來,但我會認為是因為含有 poly A tail 及5' cap等物所以才叫 heterogeneous
我的意思是pre-mRNA 是 hnRNA的一種,即hnRNA是個統稱
我校的database是" for students only"....要有a ...
原帖由 dolphin_ice 於 11/7/2008 16:00 發表
Drug synthesis and how drub works <--是要org chem 很強的嗎? (好奇而已)
原帖由 fish 於 11/7/2008 11:15 PM 發表
Pharmacy 是很重organic chem的,其分支亦是
那本hide掉的到我需要時才拿吧,現在沒有甚麼時間去理別的東東
先謝一個
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