http://www.science.gov--Use this search interface to simultaneously search 29 different government databases.
World Wide Science--A global science gateway to national and international scientific databases and portals.
Mednar--Deep web medical search engine.
http://www.atcc.org/ is an independent, private, nonprofit biological resource center. Find information here about tumor cell lines by selecting cell lines and hybridomas under "select a category" search box.
Kimball's biology pages--This is an online reference manual designed for the introductory biology student. It includes an alphabetical list of terms with brief definitions or in some cases a link to a brief essay on the subject. Most of the terms used are in the areas of cellular and molecular biology.
Microbes.info--Includes 'Hot Germ News' items, feature articles covering topics such as bioterrorism, food microbiology and medical microbiology, frequently asked questions and an extensive collection of bacterial images with descriptions and internet links.
BLAST (Basic Local Alignment Search Tool)
BLAST finds regions of similarity between biological sequences for genomes, nucleotides and proteins. The program compares nucleotide or protein sequences to sequence databases and calculates the statistical significance of matches.
Life Sciences Search Engine
National Center for Biotechnology Information creates public databases, conducts research in computational biology, develops software tools for analyzing genome data, and disseminates biomedical information.