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Interaction in Biological Definition

Symbiosis

... syn = con/plus and biono = living) is an interaction between two organisms living together in more or ... evolution is strongly based on co-operation , interaction , and mutual dependence among organisms. ... and should rather be perceived as a continuum of interaction ranging from parasitism to mutualism. In fact, ...

Phenotype

... patterns without any knowledge whatsoever of molecular biology . The interaction between genotype and phenotype has often been described using a simple ... structural, biochemical, physiological and behavioral) determined by an interaction between its genotype and environment (see genotype-phenotype ...

Antibiotic

... disrupting the balance of intestinal flora, the "good bacteria" that dwell inside the human digestive system. Other side effects can result from interaction between the antibiotic and other drugs, such as elevated risk of tendon damage from administration of a quinolone antibiotic with a systemic ...

Antibody

... They are synthesized and secreted by B cells of the immune system. B cells are activated upon binding to their specific antigen. In some cases the interaction of the B cell with a T helper cell is also necessary. Structure of the antibody Immunoglobulins are heavy plasma proteins, often with added ...

Apoptosis

... . The Fas ligand (FasL, the protein that binds to Fas and activates the Fas pathway) is a transmembrane protein, and is part of the TNF family. The interaction between Fas and FasL results in the formation of the death-inducing signaling complex (DISC), which contains the Fas-associated death domain protein ...

Sticky end/blunt end

... , sticky end and blunt end are the two possible configurations resulting from the breaking of double-stranded DNA . DNA exhibits a stabilizing interaction between complementary base pairs , providing specificity to the pairing of two strands of DNA. If two complementary strands of DNA are of equal ...

Bioinformatics

... In the structural branch of bioinformatics homology is used to determine which parts of the protein are important in structure formation and interaction with other proteins. In a technique called homology modelling, this information is used to predict the structure of a protein once the structure of a ...

Bone

... small electrical potentials under stress. Bones can be connected to muscles via tendons and other bones by ligaments . The science of the interaction of bone and muscle is called biomechanics . The science of bones is called osteology . Some illnesses afflict human bones, for example ...

Brain

... into the circulatory system by a structure called the pituitary gland . It is hypothesized that developed brains derive consciousness from interaction among numerous systems within the brain. Cognitive processing in mammals occurs in the cerebral cortex but relies on mid-brain and limbic ...

Cancer

... cancers Adult cancers is usually formed in epithelial tissues and are believed often to be the result of a long biological process related to the interaction of exogenous exposures with genetic and other endogenous characteristics among susceptible people. Examples include: bladder carcinoma , blood ...

Chromatography

... molecular weight distribution, but is low resolution . Affinity chromatography Affinity chromatography is based on selective non-covalent interaction between an analyte and specific molecules. It is very specific, but not very robust . It is often used in biochemistry in the purification of ...

Genetic code

... by the hydrophobic valine (Val) which reduces the solubility of -globin. This causes haemoglobin to form linear polymers linked by the hydrophobic interaction between the valine groups causing sickle cell deformation of erythrocytes. These variable codes for amino acids are possible because of modified ...

Bioinformatics

... In the structural branch of bioinformatics homology is used to determine which parts of the protein are important in structure formation and interaction with other proteins. In a technique called homology modelling, this information is used to predict the structure of a protein once the structure of a ...

Culture

... for ideological, sociological, and technological subsystems. Socialization is based on the belief subsystem. The sociological subsystem governs interaction between people. Material objects and their use make up the technological subsystem. [2] As a rule, archeologists focus on material culture, ...

Evolutionary developmental biology

... duplicated locus free to fulfill a new function. In contrast, changes in gene regulation , is a "second-order" effect of genes, resulting from the interaction and timing of the genetic network, as distinct from the functioning of the individual genes in the network The discovery of the homeotic Hox gene ...

Gene

... and stop sequence. Once produced, the protein interacts with the many other proteins in the cell, according to the cell metabolism . This interaction finally produces the trait. This complex process helps explain the different meanings of "gene": a nucleotide sequence in a DNA strand; ...

Genetic code

... by the hydrophobic valine (Val) which reduces the solubility of -globin. This causes haemoglobin to form linear polymers linked by the hydrophobic interaction between the valine groups causing sickle cell deformation of erythrocytes. These variable codes for amino acids are possible because of modified ...

Glycome

... diversity of the glycome's constituent carbohydrates and is further complicated by the sheer multiplicity of their possibilities of combination and interaction of the carbohydrates with each other and with proteins. An alternative definition is the collective identity of the entirety of carbohydrates in a ...

Human

... and adapt to new groups. An individual may develop strong feelings of loyalty towards such groups. Sociology is the science that describes the interaction of human beings, while cultural anthropology describes different human societies. The human individual often develops a particularly strong ...

Immune system

... Physical barrier The first defense includes barriers to infection such as skin and mucus coating of the gut and airways, physically preventing the interaction between the host and pathogen. Pathogens which penetrate these barriers encounter constitutively expressed anti-microbial molecules that restrict the ...

Immunology

... immune system , the latter of which is further divided into humoral and cellular components . The mainstay of classical immunology has been the interaction between antibodies and antigens . Without an understanding of the properties of these two biological entities, much of immunology would be ...

Ion channel

... potassium uptake in glial cells. Certain channels respond to multiple influences. For instance, the NMDA receptor is partially activated by interaction with its ligand, glutamate , but is also voltage-sensitive and only conducts when the membrane is depolarized. Some calcium-sensitive potassium ...

Major histocompatibility complex

... created by the organism itself, or they may be foreign, originating from bacteria, viruses, pollen, etc. The overarching design of the MHC-TCR interaction is that T cells should ignore self peptides while reacting appropriately to the foreign peptides. Foreign peptides that provoke an immune response ...

Metapopulation

... The Levins Model Levins' original model applied to a metapopulation distributed over many patches of suitable habitat with significantly less interaction between patches than within a patch. Population dynamics within a patch were simplified to the point where only presence and absence were ....

Magnetic resonance imaging

... or a metallic implant (like surgical prostheses , or pacemakers ) can present a (relative or absolute) contraindication towards MRI scanning: interaction of the magnetic and radiofrequency fields with such an object can lead to mechanical or thermal injury, or failure of an implanted device. As a ...

Proteome

... of the proteins present. Knowledge of the proteome requires knowledge of (1) the structure of the proteins in the proteome and (2) the functional interaction between the proteins. Proteomics , the study of the proteome, has largely been practiced through the separation of proteins by two dimensional ...

Proteomics

... high-throughput determination of protein structures in three-dimensional space. Common methods are x-ray crystallography and NMR spectroscopy . interaction proteomics . This concerns the investigation of protein interactions on the atomic, molecular and cellular levels Protein modification . Almost ...

Quaternary structure

... the disctinction between a protein and a functional, proteinaceous unit was difficult to elucidate. More recently, people refer to protein-protein interaction when discussing quaternary structure of proteins and consider all assemblies of proteins as protein complexes. See also : primary structure -- ...

Sewall Wright

... and many of its applications. Wright was the developer of adaptive surfaces ( fitness landscapes ), and he emphasized the importance of the interaction of genetic drift and natural selection in determining the outcome of evolution . He analogized natural selection to processes in animal and plant ...

Signal transduction

... receptor/ion channel proteins that perform the task of controlled transport of Ca 2+ : The InsP 3 -receptor will transport Ca 2+ upon interaction with inositol triphosphate (thus the name) on its cytosolic side. It consists of four identical subunits. The ryanodine-receptor is named ...

T cell

... of T cells controlled by thymic epithelioreticular cells, but also T cells influence the microarchitecture of thymic epithelioreticular cells. The interaction is bidirectional. This phenomenon is called " cross-talk ". See also White blood cell Sources Janeway , et al., Immunobiology. ...
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