An excited fluorescent molecule such as GFP or YFP can dispose of the energy from the absorbed photon in either of two ways: 

by fluorescence, emitting a photon of slightly longer wavelength (lower energy) than the exciting light, or 

by nonradiative fluorescence resonance energy transfer (FRET).

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#Unit 10. Ecological Principles

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#Unit 10. Ecological Principles

Global warming is changing global rainfall patterns and threatens to alter organismal distribution patterns.

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#Unit 10. Ecological Principles

The effects of corridors on plant species richness.

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#Unit 5. Developmental Biology

Arabidopsis that specify floral organ identity:

• APETALA1/ APETALA2

• APETALA3/PISTILLATA 

• AGAMOUS

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#Unit 1. Molecules and their Interaction Relevant to Biology

                                                        aa motif / Coiled-coils

3.6 a.a / turn in helix 

abcdefg 'a' &'d’ are hydrophobic residues 'e' and 'g' are found to be charged amino 

7.2 a.a / 2 turns acids 

 —7 amino acids per 2 turns in the helix 

For every turn there could be one hydrophobic residue coming same side of the helix 

Ex: GCN4