1 Subjects: “...structure...”

2 Subjects: “...layered structure...”

3 Subjects: “...structure-based drug design...”

4 Subjects: “...structural characterization...”

5 Subjects: “...higher-order structures...”

6 Subjects: “...structure and orientation of peptides in membranes...”

7 Subjects: “...structure-based drug design...”

8 Subjects: “...structure activity relationships (SAR)...”

9 Subjects: “...structure-activity relationship...”

10 Subjects: “...structure-activity relationship...”

11 Subjects: “...complex I structure...”

12 Subjects: “...structural elucidation...”

13 Subjects: “...crystal structure...”

14 Subjects: “...structure...”

15 Subjects: “...structure...”

16 Subjects: “...structure...”

17 “...Carotenoids represent a large group of isoprenoid structures with many different structural...”

18 “... of their structural and biological diversity. Many clinically used drugs have come from natural products; for example...”