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.
1 The Airbus A320 family of jet airliners consists of five aircraft: the A318, A319, A320, A321 jet airliners and ACJ business jet. 2  Only one type rating is required to fly these Airbus aircraft, as they have similar flight decks.