ECOS™ X Competent Cells [DH5α], Cat.No.: YBB-FYE610-80VL, Size: 80 vials, Store at -70°C ~ -80°C, A superior DH5a strain with a transformation efficiency similar to that of electroporation(~1010 cfu/ug), ECOS™ X can be utilized for applications which require very high transformation efficiencies, such as of genomic library construction . The “X” as shown in the name, stands for extreme, meaning this competent cell was designed to exceed and set new limitations! The “X” also represents “10” in Roman numeral; our new product aims to reach 1010 in its efficiency.