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Spliceosome
A
spliceosome
is a large and complex
molecular machine
found primarily within the
splicing speckles
of the cell nucleus of
eukaryotic cells
. The spliceosome is assembled from
snRNAs
and
protein complexes
. The spliceosome removes
introns
from a
transcribed
pre-mRNA
, a kind of
primary transcript
. This process is generally referred to as
splicing
. Only
eukaryotes
have spliceosomes and
metazoans
have a second spliceosome, the
minor spliceosome
.
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