Figure 1.Metaphases of phytohemagglutinin-stimulated peripheral blood lymphocytes. Chromosomes were co-hybridized
with peptide nucleic acid (PNA) probes (red) for telomeric
sequences and the chromosome 2 centromere serving as
internal reference probe, and stained with DAPI (blue).
Centromere signals are marked by arrows. (a) Metaphase
derived from cord blood of a male newborn, (b) Metaphase
from blood of a centenarian male.
