Negative regulators of TGF-β signaling are induced by TGF-β signaling (Example of Negative feedback): 

Ski 

SnoN 

I-Smads (Smad7)

TLS Online TPP Program

#Id: 9277

#XL - Q Biochemistry

Nod factor is b-1,4-linked N-acetyl-D-glucosamine backbone

TLS Online TPP Program

#Id: 8095

#XL - Q Biochemistry

Platelet-activating factor released from basophils and stimulates platelet aggregation and the release of vasoconstrictor serotonin from platelets.

TLS Online TPP Program

#Id: 7058

#XL - T Zoology

The Forces of Evolution

mutation, 

genetic drift

gene flow or migration

selection.

TLS Online TPP Program

#Id: 8104

#XL - T Zoology

The venoms of poisonous snakes contain (among other things) a class of enzymes known as phospholipases, enzymes that cause the breakdown of phospholipids

TLS Online TPP Program

#Id: 9957

#XL - T Zoology

Wnts are paracrine factors that make up a large family of cysteine-rich glycoproteins