Table II.

Distribution of extractable radioactivity in P. patens protonema tissue (150–242 mg FW) after feeding with [2-³H]iPR (60 pmol/mL) in a volume of 4 mL

Percentages related to total amount of extractable radioactivity are given in brackets. iPRDP, Isopentenyladenosine diphosphate; iPRTP, isopentenyladenosine triphosphate. d.l., Detection limit (approximately 0.01 pmol).

Genotype	Time	iPR	iP	iP Nucleotides		Degradation Products
				iPRMP	iPRDP, iPRTP
	h	pmol/100 mg [%]
Wild type	4	0.1 [3.7]	0.1 [4.0]	0.5 [18.9]	0.5 [20.0]	1.4 [53.4]
	20	0.6 [7.5]	1.3 [17.8]	1.2 [15.6]	0.7 [9.3]	3.7 [49.8]
tCKX7	4	<d.l.	<d.l.	<d.l.	<d.l.	14.9 [100.0]
	20	<d.l.	<d.l.	<d.l.	0.3 [2.9]	11.2 [97.1]
tCKX16	4	0.2 [3.0]	0.3 [5.4]	0.6 [10.5]	0.3 [5.6]	4.3 [75.5]
	20	<d.l.	<d.l.	0.2 [2.0]	0.4 [3.6]	10.0 [94.4]