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Science 9 January 2004: Vol. 303. no. 5655, pp. 235 - 238 DOI: 10.1126/science.1091288
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Reports
Reflectins: The Unusual Proteins of Squid Reflective Tissues
Wendy J. Crookes,1
Lin-Lin Ding,2
Qing Ling Huang,2
Jennifer R. Kimbell,1
Joseph Horwitz,2
Margaret J. McFall-Ngai1*
A family of unusual proteins is deposited in flat, structural platelets in reflective tissues of the squid Euprymna scolopes. These proteins, which we have named reflectins, are encoded by at least six genes in three subfamilies and have no reported homologs outside of squids. Reflectins possess five repeating domains, which are highly conserved among members of the family. The proteins have a very unusual composition, with four relatively rare residues (tyrosine, methionine, arginine, and tryptophan) comprising  57% of a reflectin, and several common residues (alanine, isoleucine, leucine, and lysine) occurring in none of the family members. These protein-based reflectors in squids provide a marked example of nanofabrication in animal systems.
1 Kewalo Marine Laboratory, Pacific Biomedical Research Center, University of HawaiiManoa, 41 Ahui Street, Honolulu, HI 96813, USA.
2 Jules Stein Eye Institute, University of CaliforniaLos Angeles, 100 Stein Plaza, Los Angeles, CA 90095, USA.
* To whom correspondence should be addressed. E-mail: mcfallng{at}hawaii.edu
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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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