Class II MHC transcriptional activator called CIITA and another transcription factor called RFX, have both been shown to activate the promoter of class II MHC genes.

Defects in these transcription factors cause one form of bare lymphocyte syndrome.

TLS Online TPP Program

#Id: 9273

#Section 2: General Biology

TLS Online TPP Program

#Id: 9274

#Section 2: General Biology

Bacterial Nod genes are activated to initiate nodulation in plants by plant signals flavonoids

TLS Online TPP Program

#Id: 9275

#Section 2: General Biology

NodD proteins interact directly with the signals generated by the plants and activates most conserved Nod ABC genes in bacteria

TLS Online TPP Program

#Id: 9276

#Section 2: General Biology

NodA is an N-acyltransferase that catalyzes the addition of a fatty acyl chain.

NodB is a chitin-oligosaccharide deacetylase that removes the acetyl group from the terminal nonreducing sugar.

NodC is a chitin-oligosaccharide synthase that links N-acetyl-D-glucosamine monomers.

TLS Online TPP Program

#Id: 9277

#Section 2: General Biology

Nod factor is b-1,4-linked N-acetyl-D-glucosamine backbone

TLS Online TPP Program

#Id: 9278

#Section 2: General Biology

Type III/Type IV secretion systems play a major role in transfer of bacterial Nod factor in plant cell.