ID   APCD_MASLA              Reviewed;          40 AA.
AC   P11389;
DT   01-JUL-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-1989, sequence version 1.
DT   03-AUG-2022, entry version 75.
DE   RecName: Full=Allophycocyanin alpha-B chain;
DE   Flags: Fragment;
OS   Mastigocladus laminosus (Fischerella sp.).
OC   Bacteria; Cyanobacteria; Nostocales; Hapalosiphonaceae; Mastigocladus.
OX   NCBI_TaxID=83541;
RN   [1]
RP   PROTEIN SEQUENCE.
RA   Suter F., Fueglistaller P., Lundell D.J., Glazer A.N., Zuber H.;
RT   "Amino acid sequences of alpha-allophycocyanin B from Synechococcus 6301
RT   and Mastigocladus laminosus.";
RL   FEBS Lett. 217:279-282(1987).
CC   -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC       phycobiliprotein complex. Allophycocyanin has a maximum absorption at
CC       approximately 650 nanometers.
CC   -!- SUBUNIT: Heterodimer of an alpha and a beta chain.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral membrane
CC       protein; Cytoplasmic side. Note=Forms the core of the phycobilisome.
CC   -!- PTM: Contains one covalently linked bilin chromophore.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   PIR; B27398; B27398.
DR   AlphaFoldDB; P11389; -.
DR   SMR; P11389; -.
DR   GO; GO:0030089; C:phycobilisome; IEA:UniProtKB-KW.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.490.20; -; 1.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012128; Phycobilisome_asu/bsu.
DR   InterPro; IPR038719; Phycobilisome_asu/bsu_sf.
DR   Pfam; PF00502; Phycobilisome; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
PE   1: Evidence at protein level;
KW   Antenna complex; Bile pigment; Chromophore; Direct protein sequencing;
KW   Electron transport; Membrane; Photosynthesis; Phycobilisome; Thylakoid;
KW   Transport.
FT   CHAIN           1..>40
FT                   /note="Allophycocyanin alpha-B chain"
FT                   /id="PRO_0000199086"
FT   NON_TER         40
SQ   SEQUENCE   40 AA;  4506 MW;  2FC4F66D3F091D54 CRC64;
     TVVSQVILKA DDELRYPSSG ELKSITEFLQ TGEQRVRIAQ