Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
The dates of receipt and acceptance were inadvertently omittedat the end of the report "Unwinding of duplex DNA from the SV40origin of replication by T antigen" by Mark Dodson et al. (13Nov., p. 964). They should have been, "20 May 1987; accepted11 August 1987."