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. 2010 May 24;10:230. doi: 10.1186/1471-2407-10-230

Figure 1.

Figure 1

Fluorescent signals in PHA-stimulated lymphocytes at interphase following FISH with the CEN17 probe. (A) Cell with two singlets (SS cell), in which neither allele has replicated; (B) cell with two doublets (DD cell), in which both alleles have replicated; and (C) cell with one singlet and one doublet (SD cell), a S-phase cell in which one allele has replicated while its partner has still to do so.