Contents. List of Contributors. The Biology and Exploitation of the Yeast Retrotransposon TY (A.M. Fulton, S.E. Adams, P.D. Rathjen, W. Wilson, S.M. Kingsman and A.J. Kingsman). Vaccinia Virus Recombinants (M. Mackett). Baculovirus Expression Vectors (D.H.L. Bishop and R.D. Possee). Analysis of Large DNA Molecules by Field Inversion Gel Electrophoresis (D. Grothues, W. Bautsch and B. Tuemmler). Filter Hybridization and Radiolabelling of Nucleic Acids (A.L. Bertera, M.W. Cunningham, M.R. Evans, and D.W. Harris). The Use of Synthetic Oligonucleotides as Hybridization Probes (C. Binnie). Self-Splicing of Yeast Mitochondrial RNAs (R. van der Veen, J.H.J.M. Kwakman, and L.A. Grivell). Functional Analysis of Cloned Eukaryotic Genes (A. Akrigg). Transposon Mutagenesis in Pro-Karyotes (C.J. Duggleby, D. MacGregor, and M.J. Ward). Restriction Fragment Length Polymorphisms in the Analysis of the Human Genome (N.K. Spurr). Index.