Egg chambers from Drosophila ovaries may now be fractionated in large quantities suitable for biochemical work. A suspension of isolated egg chambers is prepared by subjecting ovaries to digestion with 0.067% collagenase. Egg chambers are separated in size classes (which correspond to different developmental stages) by sieving them through a column of superimposed nylon nets. The method can, in principle, be used for the separation of any particles ranging upward from 10 μm in diameter. © 1977.
Jacobs-Lorena, M., & Crippa, M. (1977). Mass fractionation of Drosophila egg chambers. Developmental Biology, 57(2), 385–392. https://doi.org/10.1016/0012-1606(77)90223-8