A covalent radius is one-half the distance between the nuclei of two identical atoms.

TLS Online TPP Program

#Id: 9370

#XL - T Zoology

SnoN and Ski trigger abnormal cell proliferation by blocking the Smad-complex.

TLS Online TPP Program

#Id: 8551

#XL - Q Biochemistry

di-isopropylphosphofluoridate (DFP), phenylmethyl sulphonylfluoride

(PMSF) and tosylphenylalanyl-chloromethylketone (TPCK) (all serine protease inhibitors); 

iodoacetate and cystatin (thiol protease inhibitors); 

pepstatin (aspartic protease inhibitor); 

EDTA and 1,10-phenanthroline (metalloprotease inhibitors); and amastatin and bestatin (exopeptidase inhibitors).

TLS Online TPP Program

#Id: 4333

#XL - T Zoology

About 75% of the charged residues in proteins are members of ion pairs that are located mostly on the protein surface.

Despite the strong electrostatic attraction interactions contribute little to the stability of a native protein.

TLS Online TPP Program

#Id: 9811

#XL - R Botany

A toggle model is for phytochrome interconversion

The structure of the b-hairpin region of Pr is changed to an a helix during the conversion of Pr to Pfr, which initiates other conformational changes in the protein.

TLS Online TPP Program

#Id: 8326

#XL - Q Biochemistry

The two ends of microfilament polymerize at different rates:

fast-growing end - plus end

slow-growing end - minus end