Table I.
Properties of SPS isoforms from wheat, rice, and maize
| Isoform | No. of Amino Acid Residues | Molecular Mass | pI |
|---|---|---|---|
| kD | |||
| Family I (=Family C) | |||
| Wheat1 | 1,055 | 115 | 6.14 |
| Rice11 | 1,106 | 119 | 6.35 |
| Maize1 | 1,051 | 114 | 7.01 |
| Family II (=Family A) | |||
| Wheat2 | 1,076 | 119 | 6.30 |
| Rice8 | 1,066 | 119 | 6.41 |
| Maize2 | 1,059 | 118 | 6.55 |
| Family III (=Family DIII) | |||
| Wheat9 | 964 | 108 | 7.33 |
| Rice2 | 963 | 108 | 7.26 |
| Maize3 | 964 | 108 | 7.62 |
| Family IV (=Family DIV) | |||
| Wheat4 | (972) | (109) | (7.49) |
| Rice6 | 977 | 109 | 7.23 |
| Maize4 | – | – | – |
| Family V (=Family B) | |||
| Wheat6 | (1,075) | (118) | (6.66) |
| Rice1 | 1,084 | 119 | 6.70 |
| Maize5 | 1,068 | 119 | 6.64 |
Values in parentheses are estimated (see Supplemental Data, Appendix A, for details).