The most well studied type of DE is the AU-rich element (ARE) AUUUA, found in the 3’ UTR of up to 8% of mammalian mRNAs

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#Unit 5. Developmental Biology

An anterior-to-posterior gradient of Bicoid protein

An anterior-to-posterior gradient of Hunchback protein

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#Id: 9300

#Unit 4. Cell Communication and Cell Signaling

Rhodopsin has two components: 

Opsin protein, member of the GPCR A family 

11-cis-retinal light-absorbing pigment

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#Id: 948

#Unit 5. Developmental Biology

Active guanylyl cyclase causes the sperm cell to produce more cGMP, that activates a calcium channel in the cell membrane of the sperm tail.

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#Id: 6224

#Unit 12. Applied Biology

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#Unit 8. Inheritance Biology

This suppression of recombination allows alleles adapted to a specific environment to remain together, unshuffled by recombinationsomes cannot produce viable progeny.