The “para” type of these proteins is believed to form a core that generates a catch mechanism. They’re not antibodies, but the conventional type of these proteins contains four light chains and two heavy chains, the tails of which dimerize into a coiled-coil conformation. One of these proteins is [emphasize] not present in the I band of a structure whose (*) A band and H zone [emphasize] do contain it. Troponin and a protein that prefixes the name of these proteins with “tropo” work together following opening of ion channels via acetylcholine to reveal binding sites for this protein. One of these proteins that generates force for “power strokes” from ATP hydrolysis makes up “thick filaments” that lie between another protein’s “thin filaments” in sarcomeres. For 10 points, name this protein superfamily whose II (“two”) type works with actin in muscle (0[2])contraction. ■END■