ONKI3 | Medical Subject Headings

The ONKI is provided as a part of the ONKI Living Lab - an open lab for testing the latest semantic web technologies in practice, with real users like you. Currently, over 10 000 people are using ONKI each month.

We hope you like the ONKI service and enjoy using it for your purposes!

If you encounter any problems or have improvement ideas, please contact the ONKI team. We are also very much interested in your success stories in using ONKI - please share your experiences!

The ONKI Team

Jouni Tuominen, Living Lab contact person, APIs, widgets, publishing of ontologies, etc.
Eero Hyvönen, professor, head of research group

Former members: Kim Viljanen, Rami Alatalo.

Building the future of the Semantic Web and beyond.

SeCo's homepage
For the latest semantic news, follow us on Twitter and fan us on Facebook!

How can we help you?

Live presentations about ONKI: what it is? how to use it?
Support for creating and publishing ontologies.
Online technical support for using ONKI.
Co-operation in projects.
And more, please ask.


Hierarchy:	Medical Subject Headings (MeSH) ∟ Amino Acids, Peptides, and Proteins ∟ Proteins ∟ Blood Proteins ∟ Immunoproteins ∟ Complement System Proteins ∟ Anaphylatoxins ∟ Complement C4a 3 coordinate concepts ∟ Complement C3a \| ∟ Complement C5a \| ∟ Complement C4b Medical Subject Headings (MeSH) ∟ Amino Acids, Peptides, and Proteins ∟ Proteins ∟ Blood Proteins ∟ Immunoproteins ∟ Complement System Proteins ∟ Complement C4 ∟ Complement C4a 3 coordinate concepts ∟ Complement C3a \| ∟ Complement C5a \| ∟ Complement C4b X
Broader terms:	Medical Subject Headings (MeSH) ∟ Amino Acids, Peptides, and Proteins ∟ Proteins ∟ Blood Proteins ∟ Immunoproteins ∟ Complement System Proteins ∟ Anaphylatoxins ∟ Complement C4a Medical Subject Headings (MeSH) ∟ Amino Acids, Peptides, and Proteins ∟ Proteins ∟ Blood Proteins ∟ Immunoproteins ∟ Complement System Proteins ∟ Complement C4 ∟ Complement C4a Anaphylatoxins > Complement System Proteins > Immunoproteins > Blood Proteins > Proteins > Amino Acids, Peptides, and Proteins > Medical Subject Headings (MeSH) Complement C4 > Complement System Proteins > Immunoproteins > Blood Proteins > Proteins > Amino Acids, Peptides, and Proteins > Medical Subject Headings (MeSH) X
History note:	Anaphylatoxins (1980-1982) \| Complement 4 (1978-1989)X
historyNote*:	2006 (1990) X
publicMeSHNote*:	2006; see COMPLEMENT 4A 1990-2005 X
Scope note:	The smaller fragment formed when complement C4 is cleaved by COMPLEMENT C1S. It is an anaphylatoxin that causes symptoms of immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE) but its activity is weaker than that of COMPLEMENT C3A or COMPLEMENT C5A. X
activeMeSHYear*:	2006 \| 2007X
dateCreated*:	1989-05-25X
dateEstablished*:	1990-01-01X
dateRevised*:	2005-06-30X
recordAuthorizer*:	sjnX
recordMaintainer*:	ssbX
recordOriginator*:	AGSX
Type:	Concept X
Coordinate terms:	Complement C3a \| Complement C5a \| Complement C4b X
URI:	X
Labels and equivalent concepts:	Komplementti C4a (fi) C4a (fi, replaced) Komplement 4a (sv) Complement Component 4a (en, replaced) Complement 4a (en, replaced) C4a Complement (en, replaced) X
Share:	X