Circular DNA molecules purified from both bacteria and eukaryotes are usually negatively supercoiled, having values of s of approximately –0.06.

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#Id: 5211

#Unit 7. System Physiology – Animal

Activated protein C (APC), along with its cofactor protein S, inactivates factors V and VIII and inactivates an inhibitor of tissue plasminogen activator, increasing the formation of plasmin.

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#Id: 3806

#Unit 5. Developmental Biology

A second glycoprotein secreted during starvation is CMF (conditioned medium factor)

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#Id: 6779

#Unit 3. Fundamental Processes

Clustered Regularly Interspaced Short Palindromic Repeats CRISPR consist of repeated sequences (each 30 bp long and highly conserved within a given cluster) interleaved with spacer sequences of similar length but highly divergent sequence.

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#Id: 382

#Unit 2. Cellular Organization

H3 and H4 histones first form heterodimers that then come together to form a tetramer with two molecules each of H3 and H4. While H2A and H2B form heterodimers in solution but not tetramers. This assembly without DNA called Histone-only Intermediates 

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#Id: 1711

#Unit 4. Cell Communication and Cell Signaling

Healthy individuals generate IgE antibodies only in response to parasitic infections.