The initial reaction in the intrinsic system is conversion of inactive factor XII to active factor XII (XIIa).

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#Id: 10220

#Unit 6. System Physiology – Plant

PSARK::IPT transgenic cotton plants produced more root and shoot biomass, dropped fewer flowers, maintained higher chlorophyll content, and higher photosynthetic rates under reduced irrigation conditions in comparison to wild-type and segregated non-transgenic lines. 

Furthermore, PSARK::IPT-transgenic cotton plants grown in growth chamber condition also displayed greater drought tolerance. 

These results indicate that water-deficit induced expression of an isopentenyltransferase gene in cotton could significantly improve drought tolerance.

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#Id: 7366

#Unit 5. Developmental Biology

In the Drosophila egg, karyokinesis occurs without cytokinesis to create a syncytium.

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#Id: 2745

#Unit 13. Methods in Biology

RAPD bands are treated as independent loci;

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#Id: 7545

#Unit 6. System Physiology – Plant

GAI and RGA proteins normally act as repressors of gibberellin responses. Gibberellin acts indirectly through an unidentified signaling intermediate, which is thought to bind to the regulatory domains of the GAI and RGA Proteins. 

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#Id: 1886

#Unit 4. Cell Communication and Cell Signaling

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).