Amino Acid Sequence of an Amyloid Fibril Protein of Unknown Origin
Daniel Ein 1, Shigeru Kimura 2, William D. Terry 1, Judith Magnotta 1, and George G. Glenner 2
From the
1 Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20014
2 Laboratory of Experimental Pathology, National Institute of Arthritis and Metabolic Diseases, National Institutes of Health, Bethesda, Maryland 20014
A group of human amyloid fibril proteins having chemical homology and antigenic similarities to immunoglobulin light polypeptide chains has been previously described. The amino acid sequence of a different type of human amyloid fibril protein is reported. This protein lacks valine, proline, threonine, and half-cystine and its sequence is not homologous with any presently known immunoglobulin sequence. This sequence defines a new class of amyloid fibril proteins of as yet unknown origin.
Submitted on May 10, 1972