The structure of immunoglobulin variable regions in the horned shark,Heterodontus francisci.

Title

The structure of immunoglobulin variable regions in the horned shark,Heterodontus francisci.

Creator

Kehoe J M; Sharon J; Gerber-Jenson B; Litman G W

Publisher

Immunogenetics

Date

1978
1978-12

Description

The heavy and light chains of pooled antibodies of the hybodont shark,Heterodontus francisci (horned shark), were subjected to amino acid sequence analysis. Yield determinations showed that more than 90% of the available polypeptides in the respective pools were sequenced. The heavy chains were homogeneous in the initial framework segment and showed a sequence homology of approximately 70% with the corresponding region of the more recently evolved nurse shark and a 45% homology with a human myeloma heavy chain. The light chains were less homogeneous and not identifiable as either kappa or lambda chains as known in higher species. The first half-cystine characteristics of the variable domain intrachain disulfide bridge of immunoglobulins was present in the same position (22 for heavy chains; 23 for light chains) in the horned shark as in mammalian species. The sequence analysis also suggested the presence of a hypervariable region in the horned shark light chains. The combined data imply that the antigen-binding function of immunoglobulins is mediated in much the same manner in this primitive shark as in more recently evolved species, including mammals.

Identifier

Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

35–40

Issue

1

Volume

7

Citation

Kehoe J M; Sharon J; Gerber-Jenson B; Litman G W, “The structure of immunoglobulin variable regions in the horned shark,Heterodontus francisci.,” NEOMED Bibliography Database, accessed January 24, 2022, https://neomed.omeka.net/items/show/3149.

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