title: Studies of anti-Xa activity.
mesh_terms: D000990:Antithrombin III / Q000494:pharmacology*; D005170:Factor X / Q000037:antagonists & inhibitors*; D015951:Factor Xa; D000515:alpha 1-Antitrypsin / Q000494:pharmacology*
chemical_list: D000515:alpha 1-Antitrypsin; D000990:Antithrombin III; D005170:Factor X; D015951:Factor Xa