Cell purity (as determined via FACS analysis for CD34 expression) is guaranteed to be 90% or greater for all Lonza CD34+ cell products.

For some Lonza CD34+ cell products, a "budget" version of the product is available. The "budget" versions of the product, designated electronically by a "S" at the end of the product catalog number (for example, 2C-101AS), have a cell purity (as determined via FACS analysis for CD34 expression) guaranteed to be 80%-89%.