Table 1 Transaction databases from gene expression data(a) Transaction database used to extract association rules among gene attributes and expression patterns. (b) Transaction database used to extract association rules among genes.

gene A

[+]Exp 1, [+]Exp 2, [-]Exp 3, [+]Exp 4, [+]Exp 5 annotation X

gene B

[+]Exp 1, [+]Exp 2, [+]Exp 4, [+]Exp 5, annotation Z,, annotation F

gene C

[+]Exp 1, [+]Exp 2, [-]Exp 3, [+]Exp 4, [+]Exp 5, [+]Exp 6, annotation X

gene D

[+]Exp 4, [-]Exp 6, annotation B, annotation C

gene E

[+]Exp 1, [+]Exp 2, [-]Exp 3, annotation X, annotation Z

gene F

[+]Exp 1, [+]Exp 2, [-]Exp 3, [+]Exp 6, annotation X, annotation D

...

...

b

Transaction

Itemset

Experiment 1

[+]gene A, [+]gene B, [+]gene C, [+]gene E, [+]gene F

Experiment 2

[+]gene A, [+]gene B, [+]gene C, [+]gene E, [+]gene F

Experiment 3

[-]gene A, [-]gene C, [-]gene E, [-]gene F

Experiment 4

[+]gene A, [+]gene B, [+]gene C, [+]gene D

Experiment 5

[+]gene A, [+]gene B, [+]gene C

Experiment 6

[+]gene C, [-]gene D, [+]gene F

...

...