Localization of radiolabeled proteins in rabbit jugular vein clots in vivo. The radioactivity remaining in rabbit jugular vein clots allowed to polymerize in clamped-off vessels in situ for 30 minutes in the anesthetized animal, then to age with circulation restored for 60 minutes, prior to clot recovery and γ-counting is shown. Clots formed in the presence of 125I-fibrinogen and 131I-labelled plasma-derived α2AP or recombinant α2AP(13-42)-HSA or recombinant HSA. Individual data points are the mean of values for both left and right jugular veins, shown as the mean of 6 such means ± SD). Asterisk indicates the only comparison in the group significant (p < 0.05) by paired t-tests.