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Predictability of sequence homologies among lysine-rich histones by immunological distance
Abstract:
The relationship between immunological distance (I.D.) measured by microcomplement fixation and amino acid sequence difference for lysine-rich histones was tested using antisera to lysine-rich histones of known sequence, chicken H1 and H5, goose H5, and trout H1 as well as to trout H5. The best relationship between I.D. (y) and percent sequence difference (x) for lysine-rich histones, y = 2x, applies as well to other histones of known sequence but it differs from y = 5x, reported for other proteins and often used for histones. Although deviations indicate that I.D. is a poor predictor of primary sequence differences among histones, it suggests that trout H5 is more closely related to H1 than to chicken H5.
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