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Begin by searching on some of your keywords - starch branching enzymes and peas
Examine your results for clues as to how you can pick other keywords
Biological Abstracts includes a complex array of potential search categories
Organisms - names (Pisum sativum), family names (Leguminosae)
Major Concepts - important subjects or categories (Enzymology)
Chemical or Biochemical Compounds - for example, starches (amylose, amylopectin)
Refine your searching through combinations of these specialized keywords
Using Google Scholar
Another method for finding scholarly articles about a topic is to use a database that can trace the bibliography citations in articles in order to find similar articles. For this process, you will use the an academic tool that Google has produced called Google Scholar.