The main physical barriers—the body’s first line of defense—are the epithelial layers of the skin and of the mucosal and glandular tissue surfaces connected to the body’s openings

TLS Online TPP Program

#Id: 9870

#XL - R Botany

Upon absorbing UV-B photons, the tryptophans undergo structural changes that break the salt bridges, leading to the dissociation of the two functionally active monomers. The monomers then interact with COP1–SPA complexes to activate gene expression

TLS Online TPP Program

#Id: 9647

#XL - T Zoology

Constitutively active Raf kinase

a glutamic acid substitution for the valine at position 600

TLS Online TPP Program

#Id: 8029

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 5373

#XL - T Zoology

The mark-recapture technique is that after the tagged animals are released, they mix freely with unmarked individuals. The population is resampled and the numbers of marked and unmarked individuals are recorded. 

TLS Online TPP Program

#Id: 9622

#XL - T Zoology

Monomeric state of the EGF receptor,

activation loop is situated in the active site of the kinase near the interface of the N and C lobes, blocking the site’s activity; in this way the kinase is maintained in the inactive or “off” state