The second metal ion coordinates the negative charges of the b-phosphate and g-phosphate of the dNTP and stabilizes the pyrophosphate produced by joining the primer and the incoming nucleotide

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#Unit 13. Methods in Biology

A photoelastic modulator (PEM) is then used to convert the linearly polarized light into circularly polarized light.

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#Unit 6. System Physiology – Plant

Root hair cellular responses to bacterial Nod factor

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#Unit 3. Fundamental Processes

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#Unit 2. Cellular Organization

CenH3 has a unique N terminus, which does not resemble other core histones.

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#Unit 3. Fundamental Processes

HP1 is recruited to regions in which histone H3 has been methylated at lysine 9, a modification involved in heterochromatin formation. It turns out that HP1 can also interact with Dnmt1, which can promote DNA methylation in the vicinity of HP1 binding. Furthermore, Dnmt1 can directly interact with the methyltransferase responsible for H3K9 methylation, creating a positive feedback loop to ensure continued DNA and histone methylation.