has subject area Alleles Animals Apoptosis Biochemical Phenomena - Clustered Regularly Interspaced Short Palindromic Repeats Cell Nucleolus Chondrocytes Diagnostic Imaging - Microscopy, Confocal Female Fibroblasts Genetic Structures - Clustered Regularly Interspaced Short Palindromic Repeats Genome Components - Clustered Regularly Interspaced Short Palindromic Repeats Humans Investigative Techniques - Microscopy, Confocal Male Mice Mouse Embryonic Stem Cells Polymorphism, Single Nucleotide