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Additive scaling law for structural organization of chromatin in chicken erythrocyte nuclei Iashina Important noteTo cite this publication, please use the final published version (if applicable). Please check the document version above. CopyrightOther than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons. Takedown policyPlease contact us and provide details if you believe this document breaches copyrights. We will remove access to the work immediately and investigate your claim. Small-angle neutron scattering (SANS) on nuclei of chicken erythrocytes demonstrates the cubic dependence of the scattering intensity Q −3 in the range of momentum transfer Q ∈ 10 −3 -10 −2 nm −1 . Independent spin-echo SANS measurements give the spin-echo function, which is well described by the exponential law in a range of sizes (3 × 10 2 )-(3 × 10 4 ) nm. Both experimental dependences reflect the nature of the structural organization of chromatin in the nucleus of a living cell, which corresponds to the correlation function γ (r) = ln(ξ/r) for r < ξ, where ξ = (3.69 ± 0.07) × 10 3 nm, the size of the nucleus. It has the specific scaling property of the logarithmic fractal γ (r/a) = γ (r) + ln(a), i.e., the scaling down by a gives an additive constant to the correlation function, which distinguishes it from the mass fractal, which is characterized by multiplicative constant.