[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"kakomon-q-2026-jitchi-22":3},{"slug":4,"exam_year":5,"exam_round":6,"section":7,"section_code":8,"number":9,"body":10,"choices":11,"correct_indices":28,"explanation":29,"has_explanation":27,"tags":30},"2026-jitchi-22",2026,4,"実地","jitchi",22,"図の抗体分子はどれか。",[12,16,19,22,24],{"index":13,"body":14,"is_correct":15},1,"IgA",false,{"index":17,"body":18,"is_correct":15},2,"IgD",{"index":20,"body":21,"is_correct":15},3,"IgE",{"index":6,"body":23,"is_correct":15},"IgG",{"index":25,"body":26,"is_correct":27},5,"IgM",true,[25],"正答は5（IgM）。図は5つのY字が円状につながった五量体（ペンタマー）構造で、これはIgM。感染の初期（急性期）に最初につくられる。1IgA（二量体になりうる）・2IgD・3IgE・4IgG（単量体）は、五量体構造ではない。よってIgM。**覚え方**: 五量体（大きい）で感染初期に最初に出る抗体＝IgM。",null]