Colcemid Solution: for chromosome analysis during lymphocyte karyotyping and amniotic fluid cell chromosome analysis, and in cell synchronization. Potassium Chloride: for preparation of blood lymphocyte chromosomes. Sodium Citrate: is a hypotonic solution used for chromosome karyotyping. Trypsin EDTA Solution: is used for chromosome digestion before staining (Giemsa banding). Lymphogrow: is a medium has been specifically optimised for short-term culture of peripheral blood lymphocytes for chromosome analysis. Amniogrow: designed for the primary culture of human amniotic fluid cells and chorionic villi (CV) cells.