Table I. Intermediates in NADP biosynthesis pathway in NK2 transformants and vector control plants.

All metabolite analyses were performed from the same tissue samples. Values are the mean ± sem of measurements from four plants per line. *P < 0.05, compared with vector control (VC; by Student's t test). NaMN, Nicotinic acid mononucleotide; NaAD, nicotinic acid adenine dinucleotide.

Content of Intermediates	Genotype
	VC	NK2-1	NK2-2	NK2-15
	nmol/g fresh wt
Quinolic acid	7.01 ± 1.62	6.90 ± 1.12	7.11 ± 1.03	8.85 ± 1.28
Nicotinate	8.09 ± 1.76	9.04 ± 1.84	7.28 ± 1.14	8.03 ± 1.14
Nicotinamide	1.02 ± 0.47	1.11 ± 0.15	1.08 ± 0.14	1.16 ± 0.33
NaMN	0.31 ± 0.13	0.37 ± 0.09	0.21 ± 0.05	0.33 ± 0.07
NaAD	1.62 ± 0.27	1.05 ± 0.11*	1.01 ± 0.04*	0.87 ± 0.16*