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. 2001 Dec 10;155(6):899–910. doi: 10.1083/jcb.200105026

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Copyright © 2001, The Rockefeller University Press

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Figure 3. — Cation distribution on chromosomes using SIMS. SIMS analytical distribution maps of ²⁴Mg²⁺ and ⁴⁰Ca²⁺ in chromosomes from BV173 (A and D) and IM chromosomes (B and C). Note that the cation signals follow along the chromatids for methanol-acetic acid fixed chromosomes (A and D), and for fractionated chromosomes fixed in methanol-acetic acid (B) or 4% p-formaldehyde (C).