| note related to this contribution
| - 3 Department of Pharmacology, College of Medicine, The University of Arizona Health Sciences Center, Tucson, AZ 85724.
- 7 We thank Dr. Stuart Aaronson and Dr. Keith Robbins for supplying all the cell lines used, as well as for the v-sis and v-bas probes; Dr. Mark Haussler for supplying 3H-labeled all-trans-retinoic acid (RA) and for verifying the purity of RA; Ms. Carol Donaldson and Mr. Bruce Burris for their excellent technical assistance; Mr. Steven Rodney for statistical analysis; and Ms. Joan Hemmerick for aid in the preparation of the manuscript.
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