Table I.
Metabolization and ability to repress α-amylase induction of the disaccharides used in this study
| Compound | Chemical Structure | Metabolized | α-amylase Repression |
|---|---|---|---|
| Suc | Glc[1→2]Fru | Yes | Yes |
| Turanose | Glc[1→3]Fru | No | Yes |
| Nigerose | Glc[1→3]Glc | Yes | Yes |
| 3α-Galactobiose | Gal[1→3]Gal | No | No |
| Cellobiose | β-Glc[1→4]Glc | Yes | Yes |
| Lactulose | β-Gal[1→4]Fru | No | Yes |
| Lactitol | β-Gal[1→4]Glucitol | No | No |
| Lactose | β-Gal[1→4]Glc | No | No |
| 4β-Galactobiose | β-Gal[1→4]Gal | No | No |
| Leucrose | Glc[1→5]Fru | Yes | Yes |
| Isomaltose | Glc[1→6]Glc | Yes | Yes |
| Gentiobiose | β-Glc[1→6]Glc | Yes | Yes |
| Palatinose | Glc[1→6]Fru | No | Yes |
| Palatinitol | Glc[1→6]Glucitol (50%) | No | No |
| Glc[1→6]Mannitol (50%) | |||
| Melibiose | Gal[1→6]Glc | No | No |
Metabolism is defined as the ability of the disaccharides to induce an increase in the endogenous content of Glc+Fru+Suc equal to or exceeding two times that of control, as well as in bringing about a significant (two times that of control) increase in the dry wt of the isolated embryos. Data on α-amylase repression are based on the ability of the tested disaccharides (80 mm) to repress α-amylase induction by at least 70%.