SA node has an unstable resting membrane potential.

The “resting membrane potential” of the sinus nodal fiber between discharges has a negativity of about −55 to −60 millivolts.

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#Id: 7947

#Unit 2. Cellular Organization

N-linked oligosaccharides

carbohydrate chains attached to the amide nitrogen of asparagine

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#Id: 1713

#Unit 4. Cell Communication and Cell Signaling

IgE Antibodies Act by Cross-Linking Fc Receptors on the Surfaces of Innate Immune Cells. Including mast cells, basophils, and eosinophils.

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#Id: 6448

#Unit 8. Inheritance Biology

A lod score of 3 or higher is usually considered convincing evidence for linkage.

A lod score of -2 or lower is usually considered convincing evidence for independent assortment.

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#Id: 6807

#Unit 3. Fundamental Processes

The precursor RNA for the siRNA pathway is a longer dsRNA. As a consequence of this different initial substrate, Drosha is not needed for the generation of siRNAs. Cleavage by Dicer is still required, however, and again generates a suitable 21- to 22-nucleotide RNA for incorporation into RISC.

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#Id: 7241

#Unit 5. Developmental Biology

Formation of mature B-cell