What part of OXYGENE is used in the RFI ident?

The part people remember: http://youtube.com/watch?v=mrQsv4OX630 --
interesting but Delia Derbyshire did much more (if you remember the remade
Dr Who theme of the late 1960s to 1980s, the original theme being under the
latent influence of Daphne Oram).