Eukaryotic cells have two isozymes of aconitase

• The mitochondrial isozyme (convert citrate to isocitrate in the citric acid cycle)

• The cytosolic isozyme 

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#Unit 3. Fundamental Processes

Transcription that begins at promoters is specific, directed by the s-subunit

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#Unit 6. System Physiology – Plant

ABA is transported by both the xylem and the phloem, but it is normally much more abundant in the phloem sap.

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#Unit 13. Methods in Biology

To make the antibody visible in the electron microscope, it must be attached to an electron-dense marker.

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#Unit 2. Cellular Organization

One of the important substrates of the G1/S phase cyclin-CDK complexes is Cdh1.

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#Unit 4. Cell Communication and Cell Signaling

For most, but not all, RTKs, the weakly active kinase in each subunit is phosphorylate a key tyrosine in the activation loop of the other subunit (trans-phosphorylation)