Precocious germination in the ABA-deficient vp14 mutant of maize. The VP14 protein catalyzes the cleavage of 9-cis-epoxycarotenoids to form xanthoxal, a precursor of ABA. 

TLS Online TPP Program

#Id: 7491

#Unit 4. Cell Communication and Cell Signaling

Non - templated N nucleotide addition in heavy chains results from TdT activity. 

TLS Online TPP Program

#Id: 7492

#Unit 4. Cell Communication and Cell Signaling

Exonuclease trimming sometimes occurs at the VDJ and VJ junctions, causing loss of nucleotides.

TLS Online TPP Program

#Id: 7493

#Unit 4. Cell Communication and Cell Signaling

Combinatorial diversity: The same heavy chain can combine with different light chain

TLS Online TPP Program

#Id: 7494

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 7495

#Unit 4. Cell Communication and Cell Signaling

This recombinational event is catalyzed by a set of enzymes, many of which are also involved in nonhomologous end joining (NHEJ) DNA repair functions that occur in all cells.

TLS Online TPP Program

#Id: 7496

#Unit 4. Cell Communication and Cell Signaling

Only three of the proteins implicated in V(D)J recombination are unique to lymphocytes: RAG1, RAG2, and Terminal deoxynucleotidyl Transferase (TdT)