Figure 2. Micrograph of alginate (a) and APA/citrate (b) encapsulated rhIL-2 producing CHO cells respectively at day 15 and 30 post-encapsulation, prepared as described in Materials and Methods with cell suspension flow of 150 ml/h, air jet flow of 7 L/min and needle diameter of 25¹/2-gauge. Horizontal bar: 500 mm.