Table I.

In vitro activities of PEPCK, pyruvate kinase (PK), and PEP phosphatase (PP) in extracts of whole leaves and of BS strands, and in vivo formation of pyruvate (Pyr) from PEP by BS strands in the presence of 5 mm PEP, 10 mm ADP, 1 mm Mn²⁺, 1 mm Mg²⁺, and 40 mm KCl

Extract	PEPCK		PK	PP	Pyr
	μmol min−1 g−1 fresh wt	μmol min−1 mg−1 phaeophytin	μmol min−1 mg−1 phaeophytin
Whole leaves	4.34  ± 0.22	2.26  ± 0.18	0.41  ± 0.04	0.74  ± 0.12	n.d.
BS strands	n.d.	3.58  ± 0.39	0.51  ± 0.08	0.61  ± 0.09	0.39  ± 0.02

Data are means ± se of three plants. n.d., Not determined.