other half = both sides?

detailed terms = detailed information?

Context:

"This is an important step forward -- it was impossible until recently to know how this type of receptor is switched on by chemical signals like a tiny machine," said Dr. Kenneth A. Jacobson, chief of the Laboratory of Bioorganic Chemistry in NIH's National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) and an author on the paper. "The architecture of the activated receptor allows us to think in more detailed terms about the other half of the drug interaction. We hope that we're on the verge of a revolution that will expedite the process of crafting new drugs to treat disease."