1 kb DNA Ladder has 13 linear double-stranded DNA fragments from 250 bp to 10 kb. The 1 kb and 3 kb bands contain more DNA to provide internal orientation. Includes one vial of DNA ladder, 100 ng/uL in TE Buffer (500 uL). Note: Does not include 6X DNA loading buffer (available separately). 100 bp DNA Ladder in TE Buffer has 11 linear double-stranded DNA fragments from 100 bp to 1500 bp. The 500 bp band contains more DNA to provide internal orientation. Includes one vial of DNA ladder, 100 ng/uL in TE Buffer (500 uL). Note: Does not include 6X DNA loading buffer (available separately).