“The spliceosome has been described as one of ‘the most complex macromolecular machines known,’ ‘composed of as many as 300 distinct proteins and five RNAs’ ” . <http://www.evolutionnews.org/2013/09/the_spliceosome_1076371.html>.

The above Intelligent Design article draws on recent research by Frankenstein et al.
(No, really, I’m serious!!!) <http://www.sciencedirect.com/science/article/pii/S0969212612001414>
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A brief animation of spliceosome activity is included with the article.
– Richard Peachey