Antiparallel sheets are usually arranged with all their hydrophobic residues on one side of the sheet. 

This requires an alternation of hydrophilic and hydrophobic residues in the primary structure of peptides involved in antiparallel b-sheets because every other side chain projects to the same side of the sheet

TLS Online TPP Program

#Id: 8765

#Unit 1. Molecules and their Interaction Relevant to Biology

Disulfide bonds are believed to increase the stability of the native state by decreasing the conformational entropy of the unfolded state due to the conformational constraints imposed by cross-linking (i. e. decreasing the free energy of the unfolded state).  

TLS Online TPP Program

#Id: 6147

#Unit 3. Fundamental Processes

TLS Online TPP Program

#Id: 4575

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 2342

#Unit 3. Fundamental Processes

The consensus sequence reflects preferred –10 and –35 regions, separated by the optimum spacing (17 bp).

TLS Online TPP Program

#Id: 3682

#Unit 3. Fundamental Processes

IF3 is critical for a new cycle of translation.