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Table 2 Cycle threshold (Ct) values of candidate reference genes divided in the four tissue groups.

From: Evaluation of suitable reference genes for normalization of real-time reverse transcription PCR analysis in colon cancer

Gene symbol

Non-metastatic colon cancer

Metastatic colon cancer

 

Tumour

Normal

Tumour

Normal

 

Mean

SD

N

Mean

SD

N

Mean

SD

N

Mean

SD

N

18S

8,095

0,546

18

8,440

1,066

18

8,800

1.066

20

9,408

2,035

20

ACTB

20,003

0,765

18

19,949

1,209

18

20,363

1.209

20

20,578

2,673

20

B2M

17,050

0,996

18

17,041

1,002

18

17,217

1.002

20

17,085

1,632

20

GAPDH

18,503

0,722

18

19,502

1,044

18

19,211

1.044

20

20,145

2,541

20

GUSB

23,274

0,375

18

24,081

0,865

18

23,564

0.865

20

24,060

1,981

20

HMBS

25,328

0,736

18

26,577

0,974

18

25,963

0.974

20

27,030

2,436

20

HPRT1

22,795

0,814

18

24,183

0,750

18

23,320

0.750

20

24,264

1,849

20

IPO8

24,575

0,469

18

25,084

0,780

18

25,099

0.780

20

25,529

2,108

20

PGK1

20,322

1,054

18

21,151

1,012

18

20,996

1.011

20

21,573

3,257

20

POLR2A

24,007

0,634

18

24,508

1,061

18

24,933

1.061

20

25,330

2,590

20

PPIA

17,081

0,485

18

18,241

0,906

18

17,506

0.906

20

18,335

1,724

20

RPLP0

19,706

0,637

18

20,647

0,952

18

20,319

0.952

20

21,081

2,002

20

TBP

26,157

0,577

18

26,860

1,035

18

26,649

1.035

20

27,110

2,797

20

TFRC

21,774

0,926

18

23,334

1,030

18

22,679

1.030

20

23,663

2,303

20

UBC

21,285

0,675

18

21,771

1,046

18

21,532

1.046

20

22,044

2,180

20

YWHAZ

23,933

0,723

18

25,041

1,275

18

24,457

1.275

20

25,401

2,174

20