Try a keyword search. Once you find a book that is relevant to your topic, use the subject headings of that book to help you find "more like this".
Keyword Search: Biochemistry AND protein
Subject Heading: Proteins -- Analysis
Keyword Search: Alzheimer's AND genetics
Subject Heading: Alzheimer's disease -- Genetic aspects
A catalog of books and materials at libraries worldwide. Try searching here to find ALL books available on a topic. Materials available at Thomason Library will have Presbyterian College listed in locations and others can be searched in PASCAL or borrowed through Interlibrary Loan.