GSTM1 and thalassemia: However, whilst βCys112Arg (Hb Indianapolis) is linked to thalassemia (Adams et al., 1979), there are few, or no, clinical symptoms for people with βCys112Gly (Hb Saint-Marcelin), βCys112Phe [Hb Canterbury, (Brennan et al., 2002)], βCys112Tyr [Hb Yahata, (Harano et al., 1991)] and βCys112Trp [Hb Toranomon, (Harano et al., 1996)].