Abstract: The present invention relates to methods for reducing low molecular weight species of recombinantly-produced proteins. In particular, methods of reducing the formation of low molecular weight species produced by a host cell during the cell culture process through pH control of the production cell culture are disclosed. Also disclosed are methods for reducing or eliminating the generation of alternative splice variants by a host cell during production of a recombinant protein.

Abstract: Methods and systems for determining a minimum number of cell line clones necessary to produce a product having a set of target product attributes are disclosed. An example method includes generating at least one cell line capable of expressing a polypeptide; measuring, using one or more analytical instruments, a plurality of measured product attribute values of a plurality of clones of a candidate cell line; receiving inputs, via a user interface, representing a set of target product attribute values for a product; projecting, by one or more processors based upon the plurality of measured values, a minimum number of subject clones of the product using the candidate cell line necessary to produce a subset of the subject clones having product attributes that satisfy one or more conditions associated with the set of target values; and generating the projected minimum number of subject clones of the product using the candidate cell line.

Abstract: Methods producing a recombinant protein of interest in a mammalian cell culture in media lacking IGF-1 are provided. Methods for producing mammalian cells capable of growing in media lacking IGF-1 are also provided.

Abstract: PiggyBac transposases engineered to increase stability in a cell. The engineered piggyBac transposases are useful for stably transforming cells, cell line development, genome modification, and improving titer of recombinant proteins, among other uses.