Quick rough notes

1)  Strawberries probably have xanthosine biosynthesis pathway, but I need to double check that they do.
2)  Need to verify the NCBI ascension numbers i have for the caffeine biosynthesis pathway are correct.
After 1+2 then I need to make some primers.
NOTES:
 Xanthosine biosynthesis:
guanine
[e] guanine deaminase
xanthosine
or
hypoxanthine
[e]xanthine oxidoreductase
xanthosine
Caffeine synthase pathway:
XANTHOSINE
[e1] xanthosine methyltransferase (XMT)
7-METHYLXANTHOSINE
[e2] 7-methylxanthosine nucleosidase
7-METHYLXANTHINE
[e3] 7-methylxanthine methyltransferase (MXMT or theobromine synthase)
3,7-dimethylxanthine (theobromine)
[e4] 3,7-dimethylxanthine methyltransferase (caffeine synthase)
1,3,7-trimethylxanthine (caffeine)
Xanthosine biosynthesis:
guanine
[e] guanine deaminase
xanthosine
or
hypoxanthine
[e]xanthine oxidoreductase
xanthosine
Caffeine synthase pathway:
XANTHOSINE
[e1] xanthosine methyltransferase (XMT)
7-METHYLXANTHOSINE
[e2] 7-methylxanthosine nucleosidase
7-METHYLXANTHINE
[e3] 7-methylxanthine methyltransferase (MXMT or theobromine synthase)
3,7-dimethylxanthine (theobromine)
[e4] 3,7-dimethylxanthine methyltransferase (caffeine synthase)
1,3,7-trimethylxanthine (caffeine)
Source:
Uefuji H, Ogita S, Yamaguchi Y, Koizumi N, Sano H. Molecular cloning and functional characterization of three distinct N-methyltransferases involved in the caffeine biosynthetic pathway in coffee plants. Plant Physiol. 2003;132:372–380.
Uefuji H, Ogita S, Yamaguchi Y, Koizumi N, Sano H. Molecular cloning and functional characterization of three distinct N-methyltransferases involved in the caffeine biosynthetic pathway in coffee plants. Plant Physiol. 2003;132:372–380.
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