In humans, there are three RAS, three Raf, two MEK, and two MAP proteins.

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#Id: 10000

#XL - T Zoology

Calcineurin phosphatase, dephosphorylates and activates the transcription factor, Nuclear Factor Associated with T cells (NFAT).

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#Id: 10001

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Vertebrates have three homologues of the Drosophila hedgehog gene: sonic hedgehog (shh), desert hedgehog

(dhh), and indian hedgehog (ihh)

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#Id: 10002

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Desert hedgehog protein is found in the Sertoli cells of the testes

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#Id: 10003

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Mice homozygous for a null allele of dhh exhibit defective spermatogenesis

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#Id: 10004

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Indian hedgehog is expressed in the gut and cartilage and is important in postnatal bone growth

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#Id: 10005

#XL - T Zoology

Sonic hedgehog is responsible for assuring that motor neurons come only from the ventral portion of the neural tube & essential for normal patterning of the limbs