1Kb Plus DNA Ladder-20 contains 14 fragments ranging from 100bp to 20kb. It is a complete and convenient DNA ladder for many molecular biology experiments that need DNA sizing in the gel, such as restriction analysis and PCR. It is in a ready-to-loading format and a 5µl loading will yield a minimum of 30ng DNA in any single DNA band. The intensity been increased for the bands of 1kb, 3kb, 6kb and 20kb, yielding the internal reference indicators easily recognized in the gel.