Antagonists. Antagonists bind to the same receptors as full and partial agonists but do not cause activity at the receptor. Moreover, antagonists block agonists and partial agonists from binding and therefore prevent receptor activation altogether.
JetBlue operates 54 100-seat Embraer 190s, supplementing 126 150-seat that are used on longer-haul routes, according to the Aviation Week Intelligence Network fleets database. Barger, who stretched out deliveries of the after becoming CEO in 2007, stopped short of saying he regretted ordering the aircraft.
Major airlines such as Delta and United Airlines started rival mini-carriers but these have now been disbanded and absorbed by their parent airlines. JetBlue expanded to add routes all over the United States and in 2008, the airline also had twelve Caribbean/Atlantic destinations. From 2008 to 2013 JetBlue entered into codeshare agreements with Aer Lingus, Lufthansa, South African Airways, Virgin Atlantic Airways, Jet Airways, and Air China. Today JetBlue is a publicly traded company, trading on the NASDAQ under the symbol JBLU.