The initial form of rho is a gapped ring, but binding of the RNA converts it to a closed ring.

TLS Online TPP Program

#Id: 7097

#Unit 3. Fundamental Processes

In bacteria and mitochondria, the formyl residue on the initiator methionine is removed from the protein by a specific deformylase enzyme to generate a normal NH2 terminus.

TLS Online TPP Program

#Id: 7485

#Unit 4. Cell Communication and Cell Signaling

Antigenic Determinants

TLS Online TPP Program

#Id: 6113

#Unit 3. Fundamental Processes

In Escherichia coli, MutS scans the DNA, recognizing mismatches from the distortion they cause in the DNA backbone. 

MutS has an ATPase activity that is required for mismatch repair and recruits MutL, a second protein component of the repair system. MutL, in turn, activates MutH, an enzyme that causes an incision or nick on one strand near the site of the mismatch. Nicking is followed by the action of a specific helicase (UvrD) helicase unwinds the DNA, starting from the incision and moving in the direction of the site of the mismatch, and the filled in by DNA polymerase III

TLS Online TPP Program

#Id: 3293

#Unit 3. Fundamental Processes

Base excision repair of a T∙G mismatch. 

TLS Online TPP Program

#Id: 5062

#Unit 3. Fundamental Processes

As the origins are hemimethylated they bind to the cell membrane and become unavailable to methylases.