Source:http://linkedlifedata.com/resource/umls/id/C0008018
MSH: The movement of cells or organisms toward or away from a substance in response to its concentration gradient.,CSP: movement of cells or organisms in response to chemicals, whereby the cells are attracted (positive chemotaxis) or repelled (negative chemotaxis) by substances exhibiting chemical properties.,GO: The directed movement of a motile cell or organism, or the directed growth of a cell guided by a specific chemical concentration gradient. Movement may be towards a higher concentration (positive chemotaxis) or towards a lower concentration (negative chemotaxis). [ISBN:0198506732],GO: The movement of an organism, or part of an organism, in response to an external chemical gradient, usually toward or away from it. [GOC:jl, PMID:10087613],NCI: The characteristic directional movement or orientation of an organism or cell along a chemical concentration gradient either toward or away from the chemical stimulus.