In the peripheral nervous system, myelin is compacted when the extracellular portions of a membrane protein called protein zero (P0 ) lock to the extracellular portions of P0 in the apposing membrane

TLS Online TPP Program

#Id: 7181

#Unit 5. Developmental Biology

Noggin binds to BMP4 and BMP2 and inhibits their binding to receptors

TLS Online TPP Program

#Id: 7182

#Unit 5. Developmental Biology

Noggin is a secreted protein that is able to accomplish two of the major functions of the organizer:  It induces dorsal ectoderm to form neural tissue It dorsalizes mesoderm cells that contribute to the ventral mesoderm

TLS Online TPP Program

#Id: 7183

#Unit 5. Developmental Biology

Chordin is the one most acutely activated by β-catenin. Like Noggin, Chordin binds directly to BMP4 and BMP2 and prevents their complexing with their receptor

TLS Online TPP Program

#Id: 7184

#Unit 5. Developmental Biology

Antisense morpholinos to eliminate three BMP antagonists (Noggin, Chordin, and Follistatin) in Xenopus. The resulting embryos had catastrophic failure of dorsal development and lacked neural plates and dorsal mesoderm

TLS Online TPP Program

#Id: 7185

#Unit 5. Developmental Biology

In Drosophila, 

BMP homologue Decapentaplegic (Dpp) nd dorsal mesoderm

TLS Online TPP Program

#Id: 7186

#Unit 5. Developmental Biology

In Drosophila, Sog protein is a homologue of Chordin.