News tagged with ligand
(Medical Xpress)—An international team of scientists has discovered the mechanism by which zebrafish can re-grow brain neurons after they have suffered traumatic brain injury, and that this mechanism is ...
Medical research Nov 09, 2012 | 4.9 / 5 (9) | 3 |
Two clinical trials led by Johns Hopkins Kimmel Cancer Center researchers in collaboration with other medical centers, testing experimental drugs aimed at restoring the immune system's ability to spot and attack cancer, have ...
Cancer Jun 02, 2012 | 4.6 / 5 (7) | 0 |
The internet is awash with stories of how silver can be used to treat cancer. Now, lab tests have shown that it is as effective as the leading chemotherapy drug - and may have fewer side-effects.
Cancer Feb 02, 2012 | 5 / 5 (3) | 0 |
An experimental cure for Type 1 diabetes has a nearly 80 percent success rate in curing diabetic mice. The results, to be presented Saturday at The Endocrine Society's 93rd Annual Meeting in Boston, offer possible hope of ...
Medical research Jun 06, 2011 | 3.7 / 5 (3) | 0 |
(Medical Xpress)—Researchers at the University of Michigan have determined how the hormone leptin, an important regulator of metabolism and body weight, interacts with a key receptor in the brain.
Medical research Oct 11, 2012 | 5 / 5 (2) | 0 |
(Medical Xpress) -- Researchers at the University of Toronto and the University of Bath have resolved a longstanding controversy surrounding an important structure of the immune system that could result in ...
Medical research May 04, 2011 | 4 / 5 (2) | 0 |
Could engineered fatty particles help prevent AIDS? Liposomes block HIV infection in early tests; could be a cost-effective preventive for developing countries
HIV & AIDS Sep 19, 2011 | 5 / 5 (1) | 1 |
A new strategy that takes advantage of ovarian cancer's reliance on folate appears to give relapse patients extra months of life with few side effects, researchers say.
Cancer Oct 28, 2011 | 5 / 5 (1) | 0 |
A new report in Biological Psychiatry suggests that deficits in endocannabinoid function may contribute to anorexia nervosa and bulimia. Endocannabinoids are substances made by the brain that affect brain function and ch ...
Psychology & Psychiatry Oct 31, 2011 | 5 / 5 (1) | 0
Glioblastoma, a lethal brain cancer, is one of the most resistant to available therapies and patients typically live approximately 15 months.
Cancer Jan 24, 2012 | 5 / 5 (1) | 0
(HealthDay) -- Bone marrow mesenchymal stem cells (BMMSCs) activate a mechanism involving coupling of FAS/FAS ligand to induce T cell apoptosis and immune tolerance, according to an experimental study published ...
Medical research May 02, 2012 | 5 / 5 (1) | 0
Scientists provide detailed view of brain protein structure: Results may help improve drugs for neurological disorders
Researchers have published the first highly detailed description of how neurotensin, a neuropeptide hormone which modulates nerve cell activity in the brain, interacts with its receptor. Their results suggest that neuropeptide ...
Medical research Oct 10, 2012 | 5 / 5 (1) | 0 |
(HealthDay)—Lexatumumab, an agonistic, full human monoclonal antibody against tumor necrosis factor-related apoptosis-inducing ligand receptor 2, is well tolerated and may lessen certain clinical symptoms ...
Cancer Oct 16, 2012 | 5 / 5 (1) | 0
Nestled deep within the body, the epithelial lining of the respiratory system is nonetheless seriously exposed. Its direct contact with environmental air necessitates protective mechanisms that both seal ...
Medical research Jan 22, 2013 | 5 / 5 (1) | 0
Research carried out by scientists at the Georgia Institute of Technology and The University of Manchester has revealed new insights into how cells stick to each other and to other bodily structures, an essential function ...
Medical research Feb 14, 2013 | 5 / 5 (1) | 0 |
In coordination chemistry, a ligand is an ion or molecule (see also: functional group) that binds to a central metal atom to form a coordination complex. The bonding between metal and ligand generally involves formal donation of one or more of the ligand's electron pairs. The nature of metal-ligand bonding can range from covalent to ionic. Furthermore, the metal-ligand bond order can range from one to three. Ligands are viewed as Lewis bases, although rare cases are known involving Lewis acidic "ligands."
Metal and metalloids are bound to ligands in virtually all circumstances, although gaseous "naked" metal ions can be generated in high vacuum. Ligands in a complex dictate the reactivity of the central atom, including ligand substitution rates, the reactivity of the ligands themselves, and redox. Ligand selection is a critical consideration in many practical areas, including bioinorganic and medicinal chemistry, homogeneous catalysis, and environmental chemistry.
Ligands are classified in many ways: their charge, their size (bulk), the identity of the coordinating atom(s), and the number of electrons donated to the metal (denticity or hapticity). The size of a ligand is indicated by its cone angle.
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