A set of conserved protein-coding genes is tightly associated with the CRISPR sequences. The two most highly conserved members (cas1 and cas2, for “CRISPR associated”) are found in all cases

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#Id: 8854

#Unit 2. Cellular Organization

Cohesins establish linkages between the replicated DNA molecules, which are essential for their accurate segregation later in the cell cycle. This linking mechanism is coupled to DNA replication.

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#Id: 4552

#Unit 12. Applied Biology

The HPV vaccine is a preparation of virus-like particles of the major L1 capsid proteins from these viruses. The L1 proteins have been genetically engineered to be expressed by the yeast Saccharomyces cerevisiae and are released by disruption of the recombinant yeast cells as self-assembled virus-like Particles.

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#Id: 7240

#Unit 5. Developmental Biology

Surface protein on B cell

CR2(CR21)

CD19

TAPA-1(CD81)

mIg 

Igα/ Igβ

(CD79a and CD79B)

TLR

CD40

B7 (CD80/86)

ICAM-1

MHC-1 and 2

CD 22

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#Id: 2237

#Unit 11. Evolution and Behavior

Neutral selection (Ka/Ks = 1)

Positive selection (Ka/Ks > 1)

Purifying selection (Ka/Ks < 1)

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#Id: 10324

#Unit 4. Cell Communication and Cell Signaling

PD-1 has a structure similar to CTLA-4 and when activated negatively regulates T-cell function by inducing apoptosis of activated T cells.