Phytochromobilin is exported from the plastid to the cytosol where it autocatalytically attaches to the PHY apoprotein through a thioether linkage to a cysteine residue.

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#Id: 2358

#Unit 5. Developmental Biology

Each pluripotent neoblast generates a colony of neoblast cells in the flatworm.

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#Id: 3803

#Unit 5. Developmental Biology

When the ratio of PSF relative to that of bacteria exceeds a certain threshold, cells stop proliferating and initiate the expression of genes that are required for their aggregation.

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#Id: 4043

#Unit 2. Cellular Organization

When mitotic chromosomes are subjected to proteolytic enzyme (trypsin) treatment followed by staining with the chemical dye Giemsa, they generate distinct chromosome-specific patterns called G-bands.

p (short; after the French petit) or q (long; for queue, the French word for tail)

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#Id: 9935

#Unit 4. Cell Communication and Cell Signaling

In staphylococcal food poisoning and toxic shock syndrome, exotoxins produced by the pathogens function as superantigens, which can activate all T cells. 

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#Id: 10023

#Unit 4. Cell Communication and Cell Signaling

NF-κB 

heterodimeric transcription factor, composed of p50 and p65 subunits