Figure 1. Analysis of single cell expression using GFP as a model protein. (A-B) Flow cytometry over the course of six passages. (A) Derivatives of B3<T7-GFP>. (B) Derivatives of BQ<A1-GFP>. (C) Derivatives of B3<T7-GFP> separated and categorized according to the strength of their expression. S1: weak producing to S10: strong producing subclones.