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Lesson 4

Bringing it all together

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Purple! �How can we change Halo’s pink phenotype into a purple phenotype in our lab?

2

Pink Halo

Purple Halo

?

Can your network help plan for this experiment?

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Mutants

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Mutants are organisms that have

forcibly expressed or removed genes

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ADP + P

ATP

LIGHT

bop

CrtY

CrtB1

Brp

bat

lycopene

beta-carotene

retinal

bacteriorhodopsin

(BR)

GG-PP

phytoene

+

+

+

What do you think

Halobacterium salinarum mutants �(bat +, bat -, bop-) will look like? (What phenotype will you see?)