A schematic diagram of the interactions involved
inconversion of carbon from Glc into either phytic acid or Suc,
raffinose, and stachyose. HK, Hexokinase; PGI, phospho-Glc iosmerase;
UDPGP, uridine diphospho-Glc phyrophosphorylase; UDPG 4′E, uridine
diphospho-Glc 4′ epimerase; SuSy, Suc synthase; GAS, galactinol
synthase; RS, raffinose synthase; SS, stachyose synthase;
mI-1pase, myo-inositol 1-phosphate phosphatase;
mI 1PS, myo-inositol 1-phosphate synthase. The
product of the reaction catalyzed by myo-inositol
1-phosphate synthase (EC 5.5.1.4) is
l-myo-inositol 1-phosphate in the
l-convention nomenclature or
d-myo-inositol 3-phosphate in the
d-convention nomenclature. The naming of genes
that catalyze this reaction has followed the
l-convention nomenclature. Because the soybean
genes described in this paper were cloned by homology to already named
genes, the l-convention nomenclature is
maintained here and extends to the reaction products.