#$%^&*AU2019261787A120191128.pdf#####ABSTRACT Provided are methods for the creation of ultra-high density cryopreserved cell banks. In certain embodiments, these methods employ altered perfusion culture techniques that allow for production of ultra-high density cell cultures that can be cryopreserved at unexpectedly high cell densities without the need for any cell concentration steps, while retaining excellent cell viability and quality.0 0 0 4q E I~~jOj1Iciljui 0 C . CLC CL.) M~ 0 , V ) 8 0 41 EwE u 0 :10 m .2 LLI