On the left side of Hensen’s node, Sonic hedgehog (Shh) activates Cerberus, which stimulates BMPs to induce the expression of Nodal

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#Id: 5312

#Unit 7. System Physiology – Animal

During Isovolumetric Ventricular Contraction QRS waves appear as a result of electrical depolarization of the ventricles

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#Id: 2911

#Unit 13. Methods in Biology

Since 3600 equals 2 radians, one revolution of the rotor can be expressed as 2 rad.

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#Id: 8505

#Unit 1. Molecules and their Interaction Relevant to Biology

24 possible ways in which two adjacent ~ hairpin motifs, each consisting of two antiparallel ~ strands connected by a loop region, can be combined to make a more complex motif.

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#Id: 9859

#Unit 6. System Physiology – Plant

Phototropin contains two light-sensing LIGHT-OXYGEN-VOLTAGE (LOV) domains, LOV1 and LOV2, each binding a chromophore flavin mononucleotide (FMN).

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#Id: 7801

#Unit 2. Cellular Organization

An RNA helicase (Dbp5) located on the cytoplasmic side of the NPC removes NXF1 and NXT1 from the mRNA in a reaction that is powered by ATP hydrolysis.