Anchor cell

Anchor cell

The anchor cell is a type of cell responsible for patterning during development in multicellular organisms. The anchor produces a signal which nearby equipotent precursor cells receive. A precursor cells may produce one or more secondary signals, which are received by other precursors. The combination of these signals--and variations in concentration--is used by these cells to determine their ultimate fate.

Models

#In Graded Signaling, a concentration gradient of some molecule--proportional to the distance from the anchor cell--acts to signal the precursor cell. Different concentrations produce different fates.
#In Sequential Signaling, the anchor cell initiates a signaling cascade which begins in nearby precursors and spreads to those further away.
#In Combined Signaling, the graded and sequential models are merged. Either concentration or a signaling cascade may specify precursor cell fate. [Simske, JS & Kim, SK (1995). Sequential signalling during "Caenorhabditis elegans" vulval induction. "Nature 375", 142-146.]

References


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Cell membrane — Illustration of a Eukaryotic cell membrane The cell membrane or plasma membrane is a biological mem …   Wikipedia

  • cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… …   Universalium

  • anchor-hold — I. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun Etymology: anchor (I) + hold (grasp) 1. a. : the grip of an anchor b. : the bott …   Useful english dictionary

  • Anchor-hold — The cell of an anchorite or anchoress. [< anchor + MdEngl. hold = confinement, constraint] Cf. Anchorite; Ancorsetl; Ancrene Riwle …   Dictionary of Medieval Terms and Phrases

  • List of Splinter Cell characters — The following is a list of characters found throughout the Splinter Cell series of video games and novels. Contents 1 Major characters 1.1 Lieutenant Commander Samuel Sam Fisher, USN (Ret.) 1.2 Colonel Irving Lambert, USA (KIA) …   Wikipedia

  • Neural cell adhesion molecule — 1 PDB rendering based on 1epf …   Wikipedia

  • Mobile cell sites — The mobile cell sites are infrastructures transportable on trucks, allowing fast and easy installation in restricted spaces. Their use is strategic for the rapid expansion of cellular networks putting into service point to point radio connections …   Wikipedia

  • Egg and anchor — Egg Egg ([e^]g), n. [OE., fr. Icel. egg; akin to AS. [ae]g (whence OE. ey), Sw. [ a]gg, Dan. [ae]g, G. & D. ei, and prob. to OSlav. aje, jaje, L. ovum, Gr. w,o n, Ir. ugh, Gael. ubh, and perh. to L. avis bird. Cf. {Oval}.] 1. (Popularly) The oval …   The Collaborative International Dictionary of English

  • Elasticity of cell membranes — A cell membrane defines a boundary between the living cell and its environment. It consists of lipids, proteins,carbohydrates etc. Lipids and proteins are dominant components of membranes. One of the principal types of lipids in membranes is… …   Wikipedia

  • Company Level Intelligence Cell — A Company Level Intelligence Cell is a United States Marine Corps program that both pushes down 0231 Intelligence Analysts from their Battalion S 2 down to the rifle companies while simultaneously augmenting them with specially trained 0311… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”