A ribonucleoprotein complex, containing [[RNA]] and small nuclear ribonucleoproteins (snRNPs) that is assembled during the splicing of messenger RNA primary transcript to excise an intron.

RnaSplicing과정에 관여하는 [[Nucleus]]내 복합체(세포소체) GO:0005681

SeeAlso http://www.eurekalert.org/pub_releases/2004-09/wi-isr090804.php