When Phi is fixed at 0º. Clashes occur at ALL Psi angles. Phi = 0º is physically impossible.

TLS Online TPP Program

#Id: 7693

#Unit 1. Molecules and their Interaction Relevant to Biology

                                                           aa motif / Coiled-coils

Two helices are wound around each other

Alpha-helices are packed together through the hydrophobic interactions

These two helices are found to be stable in solution

They are generally found in transcription factors and intermediate filaments

They have heptad (7 amino acid) repeated sequences


TLS Online TPP Program

#Id: 6143

#Unit 3. Fundamental Processes

Cleavages are made on either side of the lesion by endonucleases encoded by the XPG and XPF genes. XPG is related to an endonuclease called FEN1 that cleaves DNA during the base excision repair pathway

TLS Online TPP Program

#Id: 8551

#Unit 1. Molecules and their Interaction Relevant to Biology

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: 1351

#Unit 4. Cell Communication and Cell Signaling

CNK serves as a molecular scaffold platform for KSR-mediated RAF activation

 

TLS Online TPP Program

#Id: 5674

#Unit 7. System Physiology – Animal

Vibration of the organ of Corti causes bending of stereocilia on the hair cells by a shearing force as the cilia push against the tectorial membrane