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  • Title: The amino acid sequence of the beta subunit of allophycocyanin.
    Author: DeLange RJ, Williams LC, Glazer AN.
    Journal: J Biol Chem; 1981 Sep 25; 256(18):9558-66. PubMed ID: 6793571.
    Abstract:
    The complete amino acid sequence of the beta subunit of Anabaena variabilis allophycocyanin is: H2N-Ala-Gln-Asp-Ala-Ile-Thr-Ala-Val-Ile-Asn-Ser-Ala-Asp-Val-Gln-Gly-Lys-Tyr-Leu-Asp-Thr-Ala-Ala-Leu-Glu-Lys-Leu-Lys-Ala-Tyr-Phe-Ser-Thr-Gly-Glu-Leu-Arg-Val-Arg-Ala-Ala-Thr-Thr-Ile-Ser-Ala-Asn-Ala-Ala-Ala-Ile-Val-Lys-Glu-Ala-Val-Ala-Lys-Ser-Leu-Leu-Tyr-Ser-Asp-Ile-Thr-Arg-Pro-Gly-Gly-Asn-Met-Tyr-Thr-Thr-Arg-Arg-Tyr-Ala-Ala-Cys-Ile-Arg-Asp-Leu-Asp-Tyr-Tyr-Leu-Arg-Tyr-Ala-Thr-Tyr-Ala-Met-Leu-Ala-Gly-Asp-Pro-Ser-Ile-Leu-Asp-Glu-Arg-Val-Leu-Asn-Gly-Leu-Lys-Glu-Thr-Tyr-Asn-Ser-Leu-Gly-Val-Pro-Val-Gly-Ala-Thr-Val-Gln-Ala-Ile-Gln-Ala-Ile-Lys-Glu-Val-Thr-Ala-Ser-Leu-Val-Gly-Ala-Asp-Ala-Gly-Lys-Glu-Met-Gly-Ile-Tyr-Leu-Asp-Tyr-Ile-Ser-Ser-Gly-Leu-Ser-COOH Phycocyanobilin is attached though a thioether linkage to cysteinyl residue 81, indicated by an asterisk. Comparison of this sequence with those of C-phycocyanins shows that there are 60 identities between corresponding subunits of these two biliproteins. Of the region between residues 79 and 120, 29 residues are identical in the beta subunits of allophycocyanin and phycocyanin. The character of all 10 charged residues in this region of the beta subunit sequences is completely conserved.
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