Termination depends on the RNA product and is not determined simply by scrutiny of the DNA sequence during transcription.

TLS Online TPP Program

#Id: 8484

#Unit 1. Structure and Function of Biomolecules

The trans form is the more favoured state because in this arrangement repulsion between non-bonded atoms connected to the Cα centre are minimized. 

For most peptide bonds the ratio of cis to trans configurations is approximately 1:1000.

TLS Online TPP Program

#Id: 8485

#Unit 1. Structure and Function of Biomolecules

Peptide bonds formed between Xaa and proline (Xaa is any amino acid) the cis to trans ratio is 1:4.

TLS Online TPP Program

#Id: 8486

#Unit 1. Structure and Function of Biomolecules

All three kinds of bonds (N-Ca, Ca-Co, and the Co-N peptide bond) are single bonds.

TLS Online TPP Program

#Id: 8487

#Unit 1. Structure and Function of Biomolecules

Co and N atoms of the peptide grouping are both in planar sp2 hybridization and the Co and O atoms are linked by a p bond, leaving the nitrogen with a lone pair of electrons in a 2p orbital.

TLS Online TPP Program

#Id: 8488

#Unit 1. Structure and Function of Biomolecules

TLS Online TPP Program

#Id: 8489

#Unit 1. Structure and Function of Biomolecules