Figure 3.

Comparison of plant PCK subunit sequences. The entire U. panicoides PCK1 amino acid sequence is shown on the top line in the single-letter code. Residues present in the PCK active site (Matte et al., 1996) are underlined. N-terminal residues determined directly from PCK polypeptides are overlined and are assigned Roman numerals corresponding to the polypeptides in Figure 8. Dots in the U. panicoides (Up) PCK2, S. anglica (Sa), Z. japonica (Zj), cucumber (Cs), and Arabidopsis (At) subunit sequences indicate residues found in the U. panicoides PCK1 sequence. Gaps (dashes) were introduced to maximize identity. The numbering refers to the positions within the comparison.