Standard DNA fragment (base pairs)

Log base pairs

Distance migrated in the gel (cm)

500

2.70

4.25

750

2.88

3.85

1000

3.00

3.55

1500

3.18

3.05

2000

3.30

2.75

3000

3.48

2.35

4000

3.60

2.05

5000

3.70

1.90

DNA fragment amplified by RT-PCR in +ve control

3.70