Linker length

G. M. Whitesides, Dependence of effective molarity on linker length for an intramolecular protein-ligand system, /. Am. Chem. Soc., 129 (2007)... 

McGhee, J.D., Nickol, J.D., Felsenfeld, G., and Rau, D.C. (1983) Higher order structure of chromatin orientation of nucleosomes within the 30 nm chromatin solenoid is independent of species and linker length. Cell 33, 831-841. 

Williams, S.P., Athey, B.D., Muglia, L.J., Schappe, R.S., Gough, A.H., and Langmore, J.P. (1986) Chromatin fiber are left-handed double helices with diameter and mass per unit length that depend on linker length. Biophys. J. 49(1), 233-248. 

Fig. 2. The geometry of the two-angle fiber can be characterized by the deflection angle 6 and the dihedral angle 0. Also indicated is B, characterizing the linker length, and the nucleosome diameter 2Rq. For simplicity, the nucleosomes are represented by spheres connected via links, the linker DNA. The arrows indicate the nucleosomal superhelix axis.

They demonstrated that the linker length influenced the median diameter of the spherical aggregate that was formed, resulting in good control over the aggregate dimension. 

Krishnamurthy,V. M., Semetey,V.,Bracher,P.J., Shen, N., Whitesides, G. M. Dependence of Effective Molarity on Linker Length for an Intramolecular Protein-Ligand System. J. Am. Chem. Soc. 2007, 129, 1312-1320. 

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