CD21

Complement C3d receptor 2 - mammalian protein found in Homo sapiens. Article “CD21” in Galician Wikipedia has 23.1 points for quality (as of July 1, 2025). The article contains 13 references and 8 sections.

This article has the best quality in English Wikipedia. Also, this article is the most popular in that (Galician) language version.

Since the creation of article “CD21”, its content was written by 2 registered users of Galician Wikipedia and edited by 51 registered Wikipedia users in all languages.

The article is cited 64 times in Galician Wikipedia and cited 1274 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Galician): #3580 in September 2022
• Global: #137941 in July 2019

The highest popularity rank from 2008:

• Local (Galician): #1884 in November 2020
• Global: #531182 in November 2014

There are 8 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	English (en) Complement receptor 2		49.4771
2	French (fr) CD21		30.4713
3	Persian (fa) گیرنده ۲ کمپلمان		27.4696
4	Russian (ru) Рецептор комплемента 2-го типа		23.773
5	Galician (gl) CD21		23.0952
6	Ukrainian (uk) Complement receptor 2		17.5365
7	German (de) Komplementrezeptor 2		14.3238
8	Italian (it) CR2		0.0892

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "CD21" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Complement receptor 2		342 726
2	Russian (ru) Рецептор комплемента 2-го типа		10 270
3	German (de) Komplementrezeptor 2		8 565
4	Galician (gl) CD21		5 822
5	Italian (it) CR2		4 360
6	Persian (fa) گیرنده ۲ کمپلمان		3 416
7	French (fr) CD21		1 832
8	Ukrainian (uk) Complement receptor 2		289

More...

The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "CD21" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Complement receptor 2		481
2	French (fr) CD21		53
3	German (de) Komplementrezeptor 2		37
4	Italian (it) CR2		34
5	Persian (fa) گیرنده ۲ کمپلمان		29
6	Russian (ru) Рецептор комплемента 2-го типа		17
7	Galician (gl) CD21		10
8	Ukrainian (uk) Complement receptor 2		3

More...

The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "CD21" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Complement receptor 2		26
2	Italian (it) CR2		8
3	Russian (ru) Рецептор комплемента 2-го типа		6
4	French (fr) CD21		3
5	German (de) Komplementrezeptor 2		2
6	Persian (fa) گیرنده ۲ کمپلمان		2
7	Galician (gl) CD21		2
8	Ukrainian (uk) Complement receptor 2		2

More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "CD21" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	German (de) Komplementrezeptor 2		0
2	English (en) Complement receptor 2		0
3	Persian (fa) گیرنده ۲ کمپلمان		0
4	French (fr) CD21		0
5	Galician (gl) CD21		0
6	Italian (it) CR2		0
7	Russian (ru) Рецептор комплемента 2-го типа		0
8	Ukrainian (uk) Complement receptor 2		0

More...

The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "CD21" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Complement receptor 2		464
2	Russian (ru) Рецептор комплемента 2-го типа		337
3	Ukrainian (uk) Complement receptor 2		334
4	Galician (gl) CD21		64
5	French (fr) CD21		59
6	German (de) Komplementrezeptor 2		9
7	Persian (fa) گیرنده ۲ کمپلمان		4
8	Italian (it) CR2		3

More...

#	Language	Value
de	German Komplementrezeptor 2
en	English Complement receptor 2
fa	Persian گیرنده ۲ کمپلمان
fr	French CD21
gl	Galician CD21
it	Italian CR2
ru	Russian Рецептор комплемента 2-го типа
uk	Ukrainian Complement receptor 2

Best Rank

Galician: #1884 11.2020

Global: #531182 11.2014

Best Rank

Galician: #3580 09.2022

Global: #137941 07.2019

On 15 February 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: Jeffrey Epstein, Wuthering Heights, 2026 Winter Olympics, Epstein files, Ilia Malinin, Wuthering Heights, Ghislaine Maxwell, Lucas Pinheiro Braathen, 2026 Winter Olympics medal table, Valentine's Day.

In Galician Wikipedia the most popular articles on that day were: Marina Castaño, Xesús Alonso Montero, Javi Maneiro, Camilo José Cela, Patrick Swayze, Queo, María Jamardo, Sergiu Mureșan Mureșan, Jeffrey Epstein, Luisa Sánchez Méndez.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information