phenotype affects entity A band abnormal sarcomere morphology abnormal A band morphology 2018-05-10T07:16:22Z any structural anomaly of the dark-staining region of a sarcomere that is situated between two I bands and marked by partial overlapping of thin (actin) and thick (myosin) filaments; an A band is anisotropic to polarized light and contains the entire length of a single thick filament; its center is traversed by the paler H zone, which in turn contains the M line abnormal anisotropic disk abnormal transverse disc MP:0030566 MPheno.ontology abnormal A disc abnormal A band abnormal Q disc abnormal A-band morphology abnormal A disk abnormal Q disk abnormal anisotropic disc abnormal anisotropic band abnormal transverse disk abnormal A-band morphology of A band phenotype