preferred_name: SL (surrogate light chain) binds IgH to form pre-BCR (Homo sapiens)
preferred_name_lc: sl (surrogate light chain) binds igh to form pre-bcr (homo sapiens)
label: SL (surrogate light chain) binds IgH to form pre-BCR (Homo sapiens)
label_lc: sl (surrogate light chain) binds igh to form pre-bcr (homo sapiens)