Ribozyme


An RNA molecule that can catalyze its own chemical reactions.

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  • Rice genome

    The first commercially important plant to have its genome sequenced. This feat, completed early in 2001, is particularly important because rice is a staple food for a large portion of the population of the world. With the rice sequence, genes can be located to improve yields and make rice more nutritious. Rice was the second […]

  • Ricin

    A potent protein toxin made from the waste left over from processing castor beans. The castor plant, which is called Ricinus communis, is found throughout the world. Ricin is fairly easy to extract. Worldwide a million tons of castor beans are processed annually in the production of castor oil. The waste mash from this process […]

  • Rickets

    A disease of infants and children that disturbs normal bone formation (ossification), leading to failure to mineralize bone. Rickets softens bone, producing osteomalacia, and permits marked bending and distortion of bones. Other features of rickets include softness of the infant’s skull (craniotabes), enlargement of the front end of the ribs (creating the ‘rachitic rosary’), thickening […]

  • Rickets, celiac

    Rickets caused by failure of the intestines to absorb calcium and fat from foods.

  • Rickets, hypophosphatemic

    A familial form of rickets characterized by hypophosphatemia (low blood phosphate level), defective intestinal absorption of phosphate, and rickets unresponsive to vitamin D. The basic problem is decreased resorption of phosphate by the tubules in the kidney. There are two different types of the disorder that are inherited in an X-linked dominant manner. Females typically […]


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