2017-03-09 09:08
The Meselson–Stahl experiment was an experiment by Matthew Meselson and Franklin Stahl with some additional help from a Canadian biologist, Mason MacDonald, and Canadian nuclear physi… Read More
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Online repository of biological information which aims to create a knowledge base for students by the provision of animations and lectures.
2017-03-09 08:59
A bacteriophage (from 'bacteria' and Greek phagein, 'to eat') is any one of a number of viruses that infect bacteria. The term is commonly used in its shortened form, phage.Typically, bacter… Read More
2017-03-09 08:58
Lysogenic cycle, or lysogeny, is one of the two alternative life cycles of a virus inside a host cell, whereby the virus that has infected a cell attaches itself to the host DNA and, acting… Read More
2016-12-18 10:17
Receptor-mediated endocytosis (RME), also called clathrin-dependent endocytosis, is a process by which cells internalize molecules (endocytosis) by the inward budding of plasma membrane vesi… Read More
2016-12-11 09:23
Exocytosis is the cellular process in which intracellular vesicles in the cytoplasm fuse with the plasma membrane and release or "secrete" their contents into the extracellular space. Exocyt… Read More
2016-12-11 07:57
RNA interference (RNAi) technology is revolutionizing the biological discovery process as well as target discovery and validation. Using RNAi, you can turn gene expression "off", or knock it… Read More
2016-12-08 10:30
Somatic cell nuclear transfer (SCNT) is a laboratory technique for creating an ovum with a donor nucleus . It can be used in embryonic stem cell research, or in regenerative medicine where i… Read More
2016-12-02 11:18
Embryonic stem cells are derived from blastocysts — embryos that are about a week old. At this stage, the blastocyst has about 100 cells. Human blastocysts like this have been donated… Read More
2016-12-01 12:17
Ligand-gated ion channels (LGICs) are a group of transmembrane ion channel proteins which open to allow ions such as Na+, K+, Ca2+, or Cl- to pass through the membrane in response to the bin… Read More
2016-09-12 14:32
This animation shows how Prozac® alleviates depression. It can also be used to illustrate in general how neuron cells communicate with each other and how a neurotransmitter sends a signa… Read More
2016-09-09 19:19
A muscle contraction (also known as a muscle twitch or simply twitch) occurs when a muscle fiber generates tension through the action of actin and myosin cross-bridge cycling. While under te… Read More
2016-09-07 10:50
Human IL-10 has been reported previously to inhibit the secretion of IFN-gamma in PBMC. In this study, we have found that human IL-10 inhibits T cell proliferation to either mitogen or anti… Read More
2016-03-06 16:47
The insulin transduction pathway is an important biochemical pathway beginning at the cellular level affecting homeostasis. This pathway is also influenced by fed versus fasting states, stre… Read More
2015-07-02 15:52
Induced pluripotent stem cells, commonly abbreviated as iPS cells or iPSCs are a type of pluripotent stem cell artificially derived from a non-pluripotent cell, typically an adult somatic ce… Read More
2014-11-01 23:22
Tamiflu (oseltamivir phosphate) is an antiviral drug marketed by the Swiss pharmaceutical company Roche. It belongs to a group of drugs called neuraminidase inhibitors and can shorten the du… Read More
2014-06-06 05:59
Sorafenib (co-developed and co-marketed by Bayer and Onyx Pharmaceuticals as Nexavar),[1] is a drug approved for the treatment of primary kidney cancer (advanced renal cell carcinoma) and ad… Read More
2014-04-03 07:27
The solution structure of the isolated fragments 1-20 (beta-hairpin), 21-40 (alpha-helix) and 41-56 (beta-hairpin), corresponding to all the secondary structure elements of the protein G B1… Read More
2014-01-22 06:14
A mast cell (or mastocyte) is a resident cell of several types of tissues and contains many granules rich in histamine and heparin. Although best known for their role in allergy and anaphyla… Read More
2013-11-16 16:41
2013-11-08 14:48
The chemical structure of everyone's DNA is the same. The only difference between people (or any animal) is the order of the base pairs. There are so many millions of base pairs in each pers… Read More
2013-11-07 13:06
2013-11-07 12:36
Active transport (or active uptake) is the mediated transport of biochemicals, and other atomic/molecular substances, across membranes. Unlike passive transport, this process requires the ex… Read More
2013-11-05 12:51
Plasmid is a DNA molecule that is separate from, and can replicate independently of, the chromosomal DNA.[1] They are double stranded and, in many cases, circular. Plasmids usually occur nat… Read More
2013-11-04 15:47
Multiple sclerosis (abbreviated MS, also known as disseminated sclerosis or encephalomyelitis disseminata) is an autoimmune condition in which the immune system attacks the central nervous s… Read More
2013-10-31 20:37
DNA extraction is a routine procedure to collect DNA for subsequent molecular or forensic analysis. There are three basic steps in a DNA extraction:Breaking the cells open to expose the DNA… Read More
2013-10-31 20:37
The western blot (alternately, immunoblot) is a method of detecting specific proteins in a given sample of tissue homogenate or extract. It uses gel electrophoresis to separate native or den… Read More
2013-10-31 20:35
The olfactory system is the sensory system used for olfaction. Most mammals and reptiles have two distinct parts to their olfactory system: a main olfactory system and an accessory olfactory… Read More
2013-10-31 20:33
AutoDock is a suite of automated docking tools. It is designed to predict how small molecules, such as substrates or drug candidates, bind to a receptor of known 3D structure.AutoDock actual… Read More
2013-10-31 20:29
Communication by extracellular signals usually involves six steps: (1) synthesis and (2) release of the signaling molecule by the signaling cell; (3) transport of the signal to the target ce… Read More
2013-10-31 20:27
Nicotinamide adenine dinucleotide, abbreviated NAD+, is a coenzyme found in all living cells. The compound is a dinucleotide, since it consists of two nucleotides joined through their phosph… Read More
2013-10-31 20:24
Ron Levy, MD, professor of Medicine at Stanford, recounts his experiences moving his discovery from the lab to the clinical setting and discusses the future of this cancer treatment. Wendy H… Read More
2013-10-29 12:22
Dr. Rhodes has a 12-year track record in cancer genomics and bioinformatics, with a significant focus on building systems to enable cutting-edge cancer research. He founded a successful canc… Read More
2013-10-29 02:59
The cAMP signal transduction contains 5 main characters: stimulative hormone receptor (Rs) or inhibitory hormone receptor (Ri); stimulative regulative G-protein (Gs) or inhibitory regulative… Read More
2013-10-28 11:07
Oncogenic activation receptor tyrosine kinases Read More
2013-10-28 09:53
Mitochondrial DNA (mtDNA) is the DNA located in organelles called mitochondria. Most other DNA present in eukaryotic organisms is found in the cell nucleus. Nuclear and mitochondrial DNA are… Read More
2013-10-28 09:40
G protein-coupled receptors (GPCRs), also known as seven transmembrane domain receptors, 7TM receptors, heptahelical receptors, and G protein-linked receptors (GPLR), comprise a large protei… Read More
2013-10-26 02:50
Endocytosis is a process whereby cells absorb material (molecules such as proteins) from the outside by engulfing it with their cell membrane. It is used by all cells of the body because mo… Read More
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