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Table 2 Abundance of aquaporin transcripts from Arabidopsis thaliana

From: From genome to function: the Arabidopsis aquaporins

Name

Number of ESTs*

Gene structure (ecotype Columbia)

Number of introns

Tissue specificity†

PIP1;1

50

Full-length

3

R, AG, FB

PIP1;2

>100

Full-length

3

R, AG

PIP1;3

60

Full-length

3

GS, FB, AG, R, ripening fruit

PIP1;4

50

Full-length

3

R, GS, FB, AG

PIP1;5

30

Full-length

3

GS, R, FB, AG

PIP2;1

~120

Full-length

3

R, GS, FB, AG

PIP2;2

20

Full-length

3

R

PIP2;3

15

Full-length

3

R, GS

PIP2;4

26

Full-length

3

R

PIP2;5

4

Partial

3

GS

PIP2;6

25

Full-length

3

FB, AG

PIP2;7

90

Full-length

3

R, FB, GS, AG

PIP2;8

8

Partial

3

R, FB

TIP1;1

>180

Full-length

1

R, other vegetative organs

TIP1;2

>230

Full-length

1

R, AG, GS

TIP1;3

0

No cDNAs

0

-

TIP2;1

79

Full-length

2

R, FB, AG

TIP2;2

70

Full-length

1

R, AG

TIP2;3

24

Full-length

1

Whole plant

‡ TIP2;x-pseudo

0

No cDNAs

1 small**

-

TIP3;1

9

Full-length

2

DS, GS, developing embryo

TIP3;2

10

Full-length

2

DS, rosette leaves

TIP4;1

9

Full-length

2

R

TIP5;1

0

No cDNAs

2

-

NIP1;1

8

Full-length

4

R

NIP1;2

1

Full-length

4

DS

NIP2;1

0

No cDNAs

3

-

‡ NIP2;1pseudo

0

No cDNAs

4 small§

-

NIP3;1

0

No cDNAs

3

-

‡ NIP3;1pseudo

0

No cDNAs

4

-

NIP4;1

0

No cDNAs

4

-

NIP4;2

0

No cDNAs

4

-

NIP5;1

1

Partial

4

rosette leaves

NIP5;1

1

Partial

3

R

NIP7;1

1

Partial

4

FB

SIP1;1

2

Partial

2

R, AG

SIP1;2

3

Full-length

2

R, AG

SIP2;1

9

Full-length

2

R

  1. *Numbers of ESTs (January 2001), rounded for the most abundant ESTs, have been reported from different ecotypes. †For the ESTs, tissues used for cDNA library preparation are listed. R, roots; GS, green siliques; AG, above ground; FB, flower bud; DS, developing seeds. Bold letters indicate the tissues from which ESTs encoding a particular AQP were predominantly isolated. ‡Possible pseudogenes. §TIP2;x-pseudo and NIP2;1-pseudo include only three predicted transmembrane segments.