Charge–charge (ionic) interactions

These interactions occur between the side chains of oppositely charged residues as well as between the NH3+ and COO− groups at the ends of polypeptide.

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#Unit 2. Cellular Organization

Z disk 

Thin actin filaments are assembled with their (+) ends embedded in a densely staining structure

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#Unit 3. Fundamental Processes

The lagging strand is synthesized discontinuously and the leading strand is synthesized continuously. This is called semidiscontinuous replication.

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#Unit 3. Fundamental Processes

Seq A binds to hemi methylated DNA and is required for delaying rereplication. 

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#Unit 5. Developmental Biology

At the same time, the protein products of the gap, pair-rule, and segment polarity genes interact to regulate another class of genes, the homeotic selector genes, whose transcription determines the developmental fate of each segment

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#Unit 6. System Physiology – Plant

DREB2A target genes are also induced by dehydration stress