T-Cell Development

a. Commitment of hematopoietic precursors to the T cell lineage

b. The initiation of antigen receptor gene rearrangements

c.  The selection and expansion of cells that have successfully rearranged one of their T-cell receptor genes (-selection).

TLS Online TPP Program

#Id: 5903

#Unit 3. Fundamental Processes

The source of this breakage is the incorporation of some uracil into DNA in place of thymine. When the uracil is removed by a repair system, the leading strand has breaks until a thymine is inserted. Thus, the lagging strand is synthesized discontinuously and the leading strand is synthesized continuously. This is called semidiscontinuous replication.

TLS Online TPP Program

#Id: 1069

#Unit 5. Developmental Biology

SOC1 and AP1 triggers LFY gene expression

TLS Online TPP Program

#Id: 570

#Unit 2. Cellular Organization

The lac operator is 21-bp sequence with twofold symmetric and is recognized by two subunits of Lac repressor

 

TLS Online TPP Program

#Id: 7152

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 2297

#Unit 3. Fundamental Processes

Two bases in the non-template strand of the –10 element (A11 and T7) flip out from their base-stacking interactions and instead insert into pockets within the s protein where they make more favorable interactions