MAPs are members of the tau family of proteins, which stabilize microtubules:

Tau 

MAP2

MAP4

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#Unit 7. System Physiology – Animal

p75 NTR forms heteromeric complexes with the different Trk receptors and enhances Trk receptor signaling

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#Unit 5. Developmental Biology

At the 4-cell stage, the EMS cell requires a signal from its neighbor (and sister cell), the P2 blastomere.

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#Unit 6. System Physiology – Plant

2-phosphoglycolate is metabolized through the C2 oxidative photosynthetic carbon cycle.

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#Unit 11. Evolution and Behavior

A third way that gene duplicates arise is by retrotransposition.

Here the messenger RNA from a gene is reverse-transcribed to DNA, which is then integrated into the genome.

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#Unit 4. Cell Communication and Cell Signaling