a. lab rat whose particular strain first originated from Brattleboro, Vermont. Due to a mutation in its gene for vasopressin, the creature lacked this hormone essential for good kidney function. Thus, it exhibited symptoms of excessive thirst and urination and a predisposition to diabetes insipidus.
BRATTLEBORO RAT: “The Brattleboro rat is one that lacks the antidiuretic hormone, vasopressin.”