PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, vol. 85, no. 15, page. 5419 - 5423, 1988-08
CELL, vol. 54, no. 2, page. 161 - 169, 1988-07-15
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, vol. 84, no. 19, page. 6649 - 6653, 1987-10
JOURNAL OF BIOLOGICAL CHEMISTRY, vol. 262, no. 26, page. 12511 - 12518, 1987-09-15