]> http://biosphere.biologydaily.com/help/taxonomy/term/1017/0 en http://biosphere.biologydaily.com/help/node/5442 This site has interesting information on Restriction Enzyme protocols. An Excerpt from the page I'm recommending: "There are some restriction enzymes which cleave partially different base sequence than recognition sequence as a result of reduced specificity when used in a large excess to substrate DNA. This phenomenon is called Star Activity. The list of enzymes for which Star Activity is noticed are shown below and the conditions to accelerate its appearance, and the base sequences cleaved by Star Activity for which such reports are available." Fri, 24 Jun 2005 17:41:06 -0700 http://biosphere.biologydaily.com/help/node/5365 Biological molecules that are insoluble in aqueous solutions and soluble in organic solvents are classified as lipids. The lipids of physiological importance for humans have four major functions: Sun, 12 Jun 2005 22:54:33 -0700 http://biosphere.biologydaily.com/help/node/5363 This is a set of interactive tutorials which allow the user some control over what is displayed and permit experimentation and self-learning. By clicking on buttons and manipulating images information about molecular structures can be obtained and users are free to move at their own pace. Sun, 12 Jun 2005 22:45:33 -0700 http://biosphere.biologydaily.com/help/node/5364 Articles by the University of Chicago Press on various biochemistry topics Sun, 12 Jun 2005 22:48:27 -0700 http://biosphere.biologydaily.com/help/node/5360 This site has tutorials and quizzes that are based on Chime and RasMol images of the molecules and macromolecules found in biochemistry. They are intended to complement standard biochemistry texts where more explanation is provided, but where interactive 3-D images of the molecules are not available. Sun, 12 Jun 2005 22:55:24 -0700 http://biosphere.biologydaily.com/help/node/5361 Review of Amino Acids, amino acids with chemscape chime, quizes , protein structure and function (by Andrew Coulson), PDB Index and sample scripts Sun, 12 Jun 2005 22:41:12 -0700 http://biosphere.biologydaily.com/help/node/5362 By "quick" we mean that in 10 minutes of your time, you'll have a working knowledge of chemistry. Skeptical? The secret is we're not using math! And don't worry — we won't try to teach you TOO much chemistry, just enough to understand the most important things that are going on. Thu, 16 Jun 2005 11:05:05 -0700 http://biosphere.biologydaily.com/help/node/5359 An excellent series of biochemistry tutorials with illustration by the George Washington University Sun, 12 Jun 2005 22:36:25 -0700 http://biosphere.biologydaily.com/help/node/5358 The website of a society that is constantly orking to advance the sciences through publication of journals, organization of scientific meetings, and advocacy for funding of basic research and education. Mon, 13 Jun 2005 09:38:18 -0700 http://biosphere.biologydaily.com/help/node/5357 A series of lecture slides, practice exams and tutorials on biochemistry Sun, 12 Jun 2005 22:25:23 -0700