ID   HCY4_MAJSQ              Reviewed;          21 AA.
AC   P82305;
DT   06-DEC-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2001, sequence version 1.
DT   25-MAY-2022, entry version 38.
DE   RecName: Full=Hemocyanin subunit 4;
DE   Flags: Fragment;
OS   Maja squinado (Spiny spider crab).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Crustacea; Multicrustacea;
OC   Malacostraca; Eumalacostraca; Eucarida; Decapoda; Pleocyemata; Brachyura;
OC   Eubrachyura; Majoidea; Majidae; Maja.
OX   NCBI_TaxID=99391 {ECO:0000305};
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE.
RX   PubMed=10327595; DOI=10.1016/s0305-0491(98)10144-x;
RA   Stoeva S., Dolashka P., Hristova R., Genov N., Voelter W.;
RT   "Subunit composition and N-terminal analysis of arthropod hemocyanins.";
RL   Comp. Biochem. Physiol. 122B:69-75(1999).
CC   -!- FUNCTION: Hemocyanins are copper-containing oxygen carriers occurring
CC       freely dissolved in the hemolymph of many mollusks and arthropods.
CC   -!- SUBCELLULAR LOCATION: Secreted, extracellular space.
CC   -!- TISSUE SPECIFICITY: Hemolymph.
CC   -!- SIMILARITY: Belongs to the tyrosinase family. Hemocyanin subfamily.
CC       {ECO:0000305}.
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DR   AlphaFoldDB; P82305; -.
DR   GO; GO:0005615; C:extracellular space; IEA:UniProtKB-SubCell.
DR   GO; GO:0005344; F:oxygen carrier activity; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Copper; Direct protein sequencing; Oxygen transport; Secreted; Transport.
FT   CHAIN           1..>21
FT                   /note="Hemocyanin subunit 4"
FT                   /id="PRO_0000204285"
FT   NON_TER         21
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   21 AA;  2419 MW;  D1C442E733EE40CA CRC64;
     DGPAQKQNTV NQLLVLIYLY K