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. 1984 Jul;81(14):4452-6.
doi: 10.1073/pnas.81.14.4452.

DNA sequence transfer between two high-cysteine chorion gene families in the silkmoth Bombyx mori

DNA sequence transfer between two high-cysteine chorion gene families in the silkmoth Bombyx mori

K Iatrou et al. Proc Natl Acad Sci U S A. 1984 Jul.

Abstract

We have previously shown that one type of high-cysteine silkmoth chorion protein (Hc-A) has evolved from the A family of chorion proteins by radical modifications of the NH2-terminal and COOH-terminal polypeptide arms: most of the arm sequences have been deleted, while short cysteine- and glycine-containing repeats have expanded into long arrays. Strikingly similar modifications of the arms have led to the evolution of a second type of high-cysteine protein (Hc-B) from the B family of chorion proteins. It appears that the parallel evolution of these high-cysteine-encoding gene families has not been entirely independent: examination of 3' untranslated regions shows evidence of information transfer between the two families.

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