Premium
Comments on the “ordinary–extraordinary phase transition” of poly(lysine)
Author(s) -
Schmitz Kenneth S.,
Lu Mei,
Singh Narinder,
Ramsay Donald J.
Publication year - 1984
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360230903
Subject(s) - chemistry , fluorescence recovery after photobleaching , phase transition , scattering , relaxation (psychology) , polyelectrolyte , diffusion , lysine , photobleaching , phase (matter) , chemical physics , fluorescence , thermodynamics , polymer , optics , physics , organic chemistry , biochemistry , psychology , social psychology , amino acid , membrane
The “ordinary–extraordinary phase transition” of poly(lysine), first reported by Lin et al. [(1978) Biopolymers 17 , 1041–1064], has been reexamined as a function of the data collection interval (Δ t ) and scattering angle (θ). These data suggest that the relaxation domains “split” as the ionic strength is lowered through the transition region. In contrast, fluorescence photobleaching recovery data of Ware and coworkers (personal communication) indicate the tracer diffusion coefficient is not sensitive to the “ordinary–extraordinary phase transition.” The apparent discrepancy between these two techniques is here proposed to be due to small ion effects on both the dynamics and the scattering power of the polyelectrolytes.