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The amino acid sequence of human lymphotoxin derived from a 1788 lymphoblastoid cell line was determined. Peptide fragments obtained by trypsin, lysine-C peptidase, cyanogen bromide, and acetic acid cleavage of the intact protein were purified by reverse-phase high performance liquid chromatography and analyzed by amino acid composition and by automated Edman degradation. The protein is 171 amino acids long with a molecular weight of 18,664. It contains one asparagine-linked glycosylation site and lacks cysteine. The salient features of the amino acid sequence of lymphotoxin are described.
Aggarwal et al. (1985) studied this question.