G. Ledyard Stebbins
George Ledyard Stebbins, Jr. (January 6 1906 – January 19 2000 ) was an American botanist and geneticist who is widely regarded as one of the leading evolutionary biologists and botanists of the 20th century. Stebbins received his Ph.D. in botany from Harvard Uni more
Action potential . B. Actual recordings of action potentials are often distorted compared to the schematic view because of variations in electrophysiological techniques used to make the recording
An action potential is a "spike" of positive and negative ionic discharge that travels along the membr more
Helicobacter pylori
Helicobacter pylori () is a Gram-negative , microaerophilic , and acidophilic bacterium that infects various areas of the stomach and duodenum . Many cases of peptic ulcer s, gastritis , duodenitis , and perhaps some cancer s are caused by H. pylori infections. However, man more
Down syndrome
Down syndrome or trisomy 21 (usually Down's Syndrome in British English
Characteristics
known as Brushfield spots
Individuals with Down syndrome may have some or all of the following physical characteristics: oblique eye fissures with epicanthic skin fold s on the inner corner of more
Enzyme inhibitor protease in a complex with the protease inhibitor ritonavir . The structure of the protease is shown by the red, blue and yellow ribbons. The inhibitor is shown as the smaller ball-and-stick structure near the centre. Created from PDB 1HXW .
Enzyme inhibitors are molecule s that more