Table 1.

Structural Features of PUP Transporter Genes and Proteins

Gene	Chromosome	Intron (Contained)	Lengtha/No. of Hydrophobic Domains	% Identity to AtPUP1	Molecular Massb (kD)
AtPUP1	NDc	ND	357/10	100	39.2
AtPUP2	2	yes	358/10	64.0	38.1
AtPUP3	4	no	373/10	29.5	41.2
AtPUP4	4	no	419/10	30.6	46.3
AtPUP5	4	no	387/10	27.5	42.2
AtPUP6	4	yes	349/9	30.4	38.6
AtPUP7	4	yes	345/9	33.0	37.8
AtPUP8	1	no	383/10	16.9	43.2
AtPUP9	1	no	382/10	32.3	42.3
AtPUP10	5	no	358/10	26.4	39.6
AtPUP11	2	no	361/10	30.9	39.1
AtPUP12	1	no	384/10	16.6	43.7
AtPUP13	4	no	373/10	28.2	41.5
AtPUP14	1	yes	393/10	19.4	43.3
AtPUP15	1	yes	389/10	19.9	43.3

^aLengths are given in amino acids.

^bCalculated molecular mass.

^cND, not determined.