Primitive Streak

First arises from a local thickening of the epiblast at the posterior edge of the area pellucida (Koller’s sickle)

By stage 2, the primitive streak cells form a third layer that lies between the hypoblast and epiblast cells.

 By stage 3, the primitive streak has become a definitive region of the epiblast, with cells migrating through it to become the mesoderm and endoderm.

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#Id: 10223

#Unit 6. System Physiology – Plant

Organo-genesis

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#Id: 6214

#Unit 12. Applied Biology

Adenoviral vectors

Adenoviruses are large linear double-stranded DNA viruses. Their large size enables them to accept large inserts. 

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#Id: 7747

#Unit 1. Molecules and their Interaction Relevant to Biology

Size of atom or atomic radii can be estimated by effective nuclear charge

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#Id: 3680

#Unit 3. Fundamental Processes

IF2 is a GTPase (a protein that binds and hydrolyzes GTP) that interacts with three key components of the initiation machinery: the small subunit, IF1, and the charged initiator tRNA (fMet-tRNAi fMet).

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#Id: 9260

#Unit 6. System Physiology – Plant

Photorespiration is very low in C4 plants and the quantum yield does not

show a temperature dependence.