title: Isolation and separation of S-competent and S-incompetent nuclei from Tradescantia pollen grains.
mesh_terms: D003585:Cell Biology; D002458:Cell Fractionation; D002467:Cell Nucleus / Q000378:metabolism*; D002499:Centrifugation, Density Gradient; D004247:DNA / Q000096:biosynthesis*; D004261:DNA Replication; D008540:Meiosis; D008722:Methods; D010944:Plants; D011058:Pollen; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
chemical_list: D014316:Tritium; D004247:DNA; D013936:Thymidine