Four related EGF receptors participate in signaling by the many members of EGF family :

In the mouse - Erb-B1, 2, 3, and 4

In humans - HER 1, 2, 3, and 4

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#Id: 8564

#Unit 1. Molecules and their Interaction Relevant to Biology

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#Id: 7033

#Unit 11. Evolution and Behavior

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#Id: 2902

#Unit 13. Methods in Biology

The sedimentation rate of a given particle will be zero when the density of the

particle and the surrounding medium are equal.

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#Id: 4456

#Unit 13. Methods in Biology

Metal shadowing- thin film of platinum is coated from a fixed angle. it provides information about the three-dimensional topology of the sample.

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#Id: 7992

#Unit 10. Ecological Principles

Excretory organs such as

a. Flame cells 

b. Nephridia 

c. Gills

d. Water vascular system

e. Kidneys  excrete these wastes.