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Mycoplasma Cell Culture Contamination: How to Detect, Eliminate, and Prevent It

Mycoplasma Cell Culture Contamination: How to Detect, Eliminate, and Prevent It Mycoplasma cell culture contamination is one of the most common and costly problems in biological research and bioprocessing. Unlike bacterial or fungal contamination, mycoplasma infections are invisible to the naked eye and will not cloud your media. These organisms grow silently alongside your cells, … Continue reading Mycoplasma Cell Culture Contamination: How to Detect, Eliminate, and Prevent It

Cell Line Characterization Before IND: What Regulators Actually Expect

Cell Line Characterization Before IND: What Regulators Actually Expect Cell line characterization before IND filing is one of the most consequential steps in early biologics development, and one of the most commonly underestimated. The FDA and ICH guidelines spell out what they want to see, but the practical question is what level of evidence is … Continue reading Cell Line Characterization Before IND: What Regulators Actually Expect

How to Validate a Stable Cell Line: Key Assays and Decision Points

How to Validate a Stable Cell Line: Key Assays and Decision Points Validating a stable cell line means confirming three things: the line expresses your protein of interest at acceptable levels, that expression holds over time, and the line is what you think it is – not a misidentified, contaminated, or genetically shifted version of … Continue reading How to Validate a Stable Cell Line: Key Assays and Decision Points

CHO vs HEK293 vs Sf9: How to Choose the Right Host Cell Line for Your Expression System

CHO vs HEK293 vs Sf9: How to Choose the Right Host Cell Line for Your Expression System Introduction Choosing a host cell line isn’t just a technical decision – it’s a project timeline decision, a budget decision, and sometimes a regulatory one. CHO, HEK293, and Sf9 are the workhorses of recombinant protein expression, but they’re … Continue reading CHO vs HEK293 vs Sf9: How to Choose the Right Host Cell Line for Your Expression System

Reducing Variability in Cell Line Expansion: Practical Process Controls

Understanding Variability in Expansion Cell line expansion introduces variability at multiple stages, including media preparation, seeding, handling, and environmental control. As a result, even small inconsistencies can lead to differences in growth rates, viability, and downstream performance. Therefore, reducing variability is essential for generating reliable and reproducible data. Moreover, variability does not always present as … Continue reading Reducing Variability in Cell Line Expansion: Practical Process Controls