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In order to clarify the physicochemical property of tissue plasminogen activator (TA),
tissue extracts of human paranasal mucous membrane and pig heart were studied by the
biochemical techniques. The studies by gel filtration revealed that two plasminogen
activators of different molecular weight were present in the extract of human paranasal
mucous membrane. The existence of tissue plasminogen activator with a low molecular
weight (LMW-TA) has not previously been reported. This molecular weight of this compound
was lower than that of cytochrome c. On the other hand, the molecular weight of tissue
plasminogen activator from pig heart (PH-TA) was similar to that of ovalbumin, about
46,000 daltons, as estimated by Sephadex G-150 gel filtration. From the physicochemical
property of LMW-TA, it is suggested that the LMW-TA from paranasal mucous membrane
with chronic sinusitis was produced by proteases, i.e. trypsin-like enzyme, present in the mucous membrane with chronic inflammation.
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Article info
Publication history
Received:
April 1,
1981
Identification
Copyright
© 1981 Society for Promotion of International Otorhinolaryngology (SPIO). Published by Elsevier Inc. All rights reserved.