MUiiuui f niiy 
69. Falck-Pedersen, E. and J. Logan. 1989. Regulation of poly(A) site selection in 
adenovirus. 7. Virol. 63:532-541. 
70. Yanisch-Perron, C., J. Vieira, and J. Messing. 1985. Improved M13 phage 
cloning vectors and host strains: nucleotide sequences of the M13mpl8 and pUC19 
vectors. Gene 33:103-119. 
71. Okayama, H. and P. Berg. 1983. A cDNA cloning vector that permits expression 
of cDNA inserts in mammalian cells. Mol. Cell. Biol. 3:280-289. 
72. Boshart, M., F. Weber, G. Jahn, K. Dorsch-Hesler, B. Fleckenstein, and W. 
Schaffner. 1985. A very strong enhancer is located upstream of an immediate early 
gene of human cytomegalovirus. Cell 41:521-530. 
73. MacGregor, G. R., A. E. Mogg, J. F. Burke, and C. T. Caskey. 1987. 
Histochemical staining of clonal mammalian cell lines expressing E. coli - 
galactosidase indicates heterogeneous expression of the bacterial gene. Somat. Cell 
Mol. Genet. 13:253-265. 
74. Van Beveren, F., J. Coffin, and S. Hughes. 1985. Origins of contemporary RNA 
tumor virus research. In RNA Tumor Viruses. R. Weiss, N. Teich, H. Varmus, and 
J. Coffin, editors. Cold Spring Harbor Laboratory, Cold Spring Harbor, NY. 1-24. 
75. Kost, T. A., N. Theodorakis, and S. H. Hughes. 1983. The nucleotide sequence of 
the chick cytoplasmic beta-actin gene. Nucleic Acids Res. 11:8287-8301. 
76. Seed, B. and A. Aruffo. 1987. Molecular cloning of the CD2 antigen, the T-cell 
erythrocyte receptor, by a rapid immunoselection procedure. Proc. Natl. Acad. Sci. 
U. S. A. 84:3365-3369. 
77. Cladaras, C. and W. S. Wold. 1985. DNA sequence of the early E3 transcription 
unit of adenovirus 5. Virology 140:28-43. 
78. Iannuzzi, M. C., J. L. Weber, J. Yankaskas, R. Boucher, and F. S. Collins. 1988. 
The introduction of biologically active foreign genes into human respiratory 
epithelial cells using electroporation. Am. Rev. Respir. Dis. 138:965-968. 
79. Curiel, D. T., S. Agarwal, N. Romer, E. Wagner, M. Cotten, M. L. Birnstiel, and 
R. C. Boucher. 1992. Gene transfer to respiratory epithelial cells via the receptor- 
mediated endocytosis pathway. Am. J. Respir. Cell. Mol. Biol. 6:247-252. 
80. Blenkinsopp, W. K. 1967. Proliferation of respiratory tract epithelium in the rat. 
Exp. Cell Res. 46:144-154. 
81. Bolduc, P. and L. Reid. 1976. Mitotic index of the bronchial and alveolar lining 
of the normal rat lung .Am. Rev. Respir. Dis. 114:1121-1128. 
[516] 
Recombinant DNA Research, Volume 17 
