Dissertations and theses can be a good source for protocols. Like PubMed, searching dissertations and theses is rather imperfect. To find protocols, try adding MeSH (Medical Subject Headings) to the keyword or phrase (such as "gluconeogenesis AND methods").
Other MeSH headings to try:
Library databases that concentrate on dissertations and theses:
Includes dissertation and thesis citations from around the world (1861 to the present). Dissertations since July 1980 and Master's theses since 1988 include abstracts. Where available, a 24-page preview is included. Full-text of dissertations and theses from Big Ten universities and The University of Chicago are available; full text of approximately 1 million more are available for a fee.