A, Oxyblot of lung proteins of guinea pigs exposed to air or cigarette smoke (CS) with or without giving black tea as the drink. The guinea pigs were exposed to air or cigarette smoke (as described under Materials and Methods) and were given water or black tea (BT) as the drink before being sacrificed after 7 days of CS/air exposure. Lane 1, air-exposed guinea pigs given BT as the drink; lane 2, CS-exposed guinea pigs given BT as the drink; lane 3, air-exposed guinea pigs given water as the drink; lane 4, CS-exposed guinea pigs given water as the drink. B, Densitometric measurement of the lanes 1, 2, 3, and 4, respectively of Figure 1 A using Quantity One- 4.4 (Bio-Rad) Software. * Bars over the respective columns represent means ± SD (n = 4).