Fly pigment intoduction

1

L gene N gene E gene

L enzyme N enzyme E enzyme

precursor L substance N substance brown pigment

Wild type Red

yellow pigment (darkens)1

precursor2 blue pigment3 orange pigment5

P enzyme green-blue pigment4 D enzyme

P gene R gene R enzyme D gene

violet-blue6

Note: only the bottom metabolic pathway was observable on the chromatography paper. All of the

genes are represented by the dominant alleles which produce functional enzyme. Recessive alleles

produce enzyme with less or no function.

Footnotes

1 sepiapterin Reaume et al. (1991) noted that sepiapterin broke down quickly in UV light to give

another unspecified pigment

2 7,8-dihydroneopterin triphosphate Kim et al. (2013)

3 pyruvyl tetrahydrobioptern Kamleh et al. (2009), 2-amino-4-hydroxypteridine Mertens and

Hammersmith (2007)

4 xanthopterin Kamleh et al. (2009)

5 drosopterin Kamleh et al. (2009), Kim et al. (2013)

6 isoxanthopterin Ziegler (2003)