Additive scaling law for structural organization of chromatin in chicken erythrocyte nuclei

作者：Iashina E G^*; Velichko E V; Filatov M V; Bouwman W G; Duif C P; Brulet A; Grigoriev S V

来源：PHYSICAL REVIEW E, 2017, 96(1): 012411.

DOI：10.1103/PhysRevE.96.012411

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 is an element of 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 x 10(2))-(3 x 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 gamma(r) = ln(xi / r) for r < xi, where xi = (3.69 +/- 0.07) x 10(3) nm, the size of the nucleus. It has the specific scaling property of the logarithmic fractal gamma(r/a) = gamma(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.

• 出版日期2017-7-19
• 单位中国地震局