Two major classes of actin-nucleating proteins:

1. Formins nucleate the assembly of unbranched filaments 

2. Arp2/3 complex nucleates the assembly of branched actin networks

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#Id: 6619

#Unit 7. System Physiology – Animal

Inhibin is produced by ovarian granulosa cells, Inhibits FSH secretion from the anterior pituitary.

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#Id: 6420

#Unit 2. Cellular Organization

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#Id: 7611

#Unit 5. Developmental Biology

Polyspermy occurs more frequently in mouse eggs bearing mutant ZP2 that cannot be cleaved by ovastacin

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#Id: 9474

#Unit 4. Cell Communication and Cell Signaling

SHP1 

Binding of an SH2 domain to a phosphotyrosine in the activated receptor unmasks its phosphatase catalytic site

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#Id: 2879

#Unit 13. Methods in Biology

Instruments specifically designed to measure turbid samples are nephelometers or Klett meters.