Abstract

The rates of glutaraldehyde and formaldehyde fixation of F1 histones have been investigated using chromatin from rat pancreas, chicken erythrocyte, and human spleen. These chromatins differ in number, type and relative proportion of F1 species present. In all cases the rates of fixation by glutaraldehyde and formaldehyde of the F1 components is much faster than for the other histones. The rates of fixation of F1-type histones are similar in each case with the exception of one minor F1 histone from chicken which reacts slower than the rest of that F1 group. The results suggest that the interactions of all F1 type histones with DNA are similar.

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