Unbound receptors are internalized at a relatively slow rate, on average once every 30 minutes, and are recycled rapidly to the plasma membrane so there is little reduction in the total number of surface receptors. 

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#Id: 7297

#Unit 6. System Physiology – Plant

Phosphorylated PEPCase is catalytically more active and less sensitive to inhibition by malate than the nonphosphorylated form. PEPCase‐kinase catalyzes the phosphorylation of PEPCase

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#Id: 8413

#Unit 2. Cellular Organization

Troponin C is closely related to the ubiquitous 

Ca2+-binding protein calmodulin

TLS Online TPP Program

#Id: 1005

#Unit 5. Developmental Biology

In Drosophila, Toll protein is a maternal product required for ventral axis.

TLS Online TPP Program

#Id: 1624

#Unit 4. Cell Communication and Cell Signaling

Lactoferrin Binds and sequesters iron, limiting growth of bacteria and fungi.

TLS Online TPP Program

#Id: 4320

#Unit 11. Evolution and Behavior

When the roof leaked and the grain molded, mice appeared. Jan Baptista van Helmont, a seventeenth century Flemish scientist, proposed that mice could arise from rags and wheat kernels left in an open container for 3 weeks.