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: 3992

#Unit 2. Cellular Organization

Because nucleosomal DNA wraps around the histone protein 1.65 times, the formation of a single nucleosome using ccc plasmid would create a writhe of –1.65 and thus change the linking number by an equivalent amount. As described above, when the change in linking number associated with each nucleosome was measured, the number was lower than this, approximately –1.2 for each nucleosome added.

This discrepancy is referred to as the “nucleosome linking  number paradox,”

TLS Online TPP Program

#Id: 6008

#Unit 3. Fundamental Processes

At the end of the cell cycle, ORC is bound to A–B1 elements of the origin. There is a change during G1 that results from the binding of Cdc6 and Cdt1 proteins to the ORC. 

In yeast, Cdc6 is a highly unstable protein, with a half-life of 5 minutes. It is synthesized during G1 and typically binds to ORC between the exit from mitosis and late G1. Its rapid degradation means that no protein is available later in the cycle.

TLS Online TPP Program

#Id: 5194

#Unit 7. System Physiology – Animal

Factor X can be activated by either of two systems: Intrinsic system Extrinsic system

TLS Online TPP Program

#Id: 368

#Unit 2. Cellular Organization

Supercoiling is related to two properties of genome

1. Packaging 

2. Linking number

TLS Online TPP Program

#Id: 3282

#Unit 3. Fundamental Processes

In Escherichia coli,  the complex of MutS and the mismatch-containing DNA recruits MutL, a second protein component of the repair system.