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A class of regulatory proteins encoded by the TP53 gene in vertebrates which bind DNA and regulate gene expression in order to protect the genome from mutation and block progression through the cell cycle if DNA damage does occur. [4] It is mutated in more than 50% of human cancers, indicating it plays a crucial role in preventing cancer formation.
Measuring gene expression is an important part of many life sciences, as the ability to quantify the level at which a particular gene is expressed within a cell, tissue or organism can provide a lot of valuable information. For example, measuring gene expression can: Identify viral infection of a cell (viral protein expression).
Most early expression profiling experiments, and many current ones, have this form [7] which is known as class discovery. A popular approach to class discovery involves grouping similar genes or samples together using one of the many existing clustering methods such the traditional k-means or hierarchical clustering, or the more recent MCL. [8]
Testing Ames test – salmonella bacteria is exposed to a chemical under question (a food additive, for example), and changes in the way the bacteria grows are measured.. This test is useful for screening chemicals to see if they mutate the structure of DNA and by extension identifying their potential to cause cancer in hu
The following outline is provided as a topical overview of science; the discipline of science is defined as both the systematic effort of acquiring knowledge through observation, experimentation and reasoning, and the body of knowledge thus acquired, the word "science" derives from the Latin word scientia meaning knowledge.
Aerolithology – Science of meteorites – study of aerolites; meteorites. [6] Aeropalynology – study of pollens and spores in atmosphere. [7] Aerology – Synonym for atmospheric science; Aeronautics – Science involved with the study, design, and manufacturing of airflight-capable machines; Aerostatics – Study of gases that are not in ...
Biology is the scientific study of life. [1] [2] [3] It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. [1] [2] [3] For instance, all organisms are composed of at least one cell that processes hereditary information encoded in genes, which can be transmitted to future ...
Physical science is an encompassing term for the branches of natural science that study non-living systems, in contrast to the life sciences. However, the term "physical" creates an unintended, somewhat arbitrary distinction, since many branches of physical science also study biological phenomena.