Your Query returns 4 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MRLCNM_1704747227LC2    RLC    dro    MLC2    MYL2    RLC2    Dmlc2    MLC-2    CG2184    DmMLC2    l(3)99Eb    dro MLC-2    Ifm(3)99Eb    Myosin LC2    Myosin Light Chain-2    Myosin Regulatory Light Chain    muscle-specific myosin regulatory light chain   
MRLCNM_0798477227LC2    RLC    MLC2    MYL2    RLC2    Dmlc2    MLC-2    CG2184    DmMLC2    l(3)99Eb    Ifm(3)99Eb   
MRLCNM_1704747227LC2    RLC    MLC2    MYL2    RLC2    Dmlc2    MLC-2    CG2184    DmMLC2    l(3)99Eb    Ifm(3)99Eb   
MRLCNT_0337777227LC2    RLC    MLC2    MYL2    RLC2    Dmlc2    MLC-2    CG2184    DmMLC2    l(3)99Eb    Ifm(3)99Eb   

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002