CD21

fr

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CD21

Quality:

Complement C3d receptor 2 - mammalian protein found in Homo sapiens. Article “CD21” in French Wikipedia has 30.5 points for quality (as of July 1, 2026). The article contains 12 references and 3 sections.

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

Since the creation of article “CD21”, its content was written by 4 registered users of French Wikipedia and edited by 55 registered Wikipedia users in all languages.

The article is cited 60 times in French Wikipedia and cited 1265 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (French): #60490 in July 2023
  • Global: #138248 in July 2019

The highest popularity rank from 2008:

  • Local (French): #497522 in May 2024
  • Global: #538773 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, 2026 (including revision history and pageviews for previous years).

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

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
Complement receptor 2
49.3747
2French (fr)
CD21
30.4524
3Persian (fa)
گیرنده ۲ کمپلمان
27.267
4Russian (ru)
Рецептор комплемента 2-го типа
23.6681
5Galician (gl)
CD21
23.0707
6Ukrainian (uk)
Complement receptor 2
16.3928
7German (de)
Komplementrezeptor 2
15.5262
8Italian (it)
CR2
0.9214
More...

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

Most popular in all the time

The most popular language versions of the article "CD21" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Complement receptor 2
347 793
2Russian (ru)
Рецептор комплемента 2-го типа
10 505
3German (de)
Komplementrezeptor 2
8 896
4Galician (gl)
CD21
5 916
5Italian (it)
CR2
4 536
6Persian (fa)
گیرنده ۲ کمپلمان
3 582
7French (fr)
CD21
2 439
8Ukrainian (uk)
Complement receptor 2
323
More...

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

Most popular in June 2026

The most popular language versions of the article "CD21" in June 2026
#LanguagePopularity awardRelative popularity
1English (en)
Complement receptor 2
360
2French (fr)
CD21
56
3German (de)
Komplementrezeptor 2
31
4Persian (fa)
گیرنده ۲ کمپلمان
16
5Galician (gl)
CD21
9
6Italian (it)
CR2
9
7Russian (ru)
Рецептор комплемента 2-го типа
8
8Ukrainian (uk)
Complement receptor 2
2
More...

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

The highest AI

Language versions of the article "CD21" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Complement receptor 2
27
2Italian (it)
CR2
9
3Russian (ru)
Рецептор комплемента 2-го типа
6
4French (fr)
CD21
4
5German (de)
Komplementrezeptor 2
3
6Persian (fa)
گیرنده ۲ کمپلمان
2
7Galician (gl)
CD21
2
8Ukrainian (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.

The highest AI in June 2026

Language versions of the article "CD21" with the highest AI in June 2026
#LanguageAI awardRelative AI
1German (de)
Komplementrezeptor 2
0
2English (en)
Complement receptor 2
0
3Persian (fa)
گیرنده ۲ کمپلمان
0
4French (fr)
CD21
0
5Galician (gl)
CD21
0
6Italian (it)
CR2
0
7Russian (ru)
Рецептор комплемента 2-го типа
0
8Ukrainian (uk)
Complement receptor 2
0
More...

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

The highest CI

Language versions of the article "CD21" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Complement receptor 2
462
2Russian (ru)
Рецептор комплемента 2-го типа
336
3Ukrainian (uk)
Complement receptor 2
334
4French (fr)
CD21
60
5Galician (gl)
CD21
60
6German (de)
Komplementrezeptor 2
9
7Italian (it)
CR2
3
8Persian (fa)
گیرنده ۲ کمپلمان
1
More...

Scores

Estimated value for Wikipedia:
French:
Global:
Popularity in June 2026:
French:
Global:
Popularity in all years:
French:
Global:
Authors in June 2026:
French:
Global:
Registered authors in all years:
French:
Global:
Citations:
French:
Global:

Quality measures

Interwikis

#LanguageValue
deGerman
Komplementrezeptor 2
enEnglish
Complement receptor 2
faPersian
گیرنده ۲ کمپلمان
frFrench
CD21
glGalician
CD21
itItalian
CR2
ruRussian
Рецептор комплемента 2-го типа
ukUkrainian
Complement receptor 2

Popularity rank trends

Best Rank French:
#497522
05.2024
Global:
#538773
11.2014

AI rank trends

Best Rank French:
#60490
07.2023
Global:
#138248
07.2019

Languages comparison

Important global interconnections (July 2025 – June 2026)

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

gl: CD21
it: CR2
fr: CD21

News from 1 July 2026

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In French Wikipedia the most popular articles on that day were: Michael Olise, Liste des buteurs de la Coupe du monde de football, Coupe du monde de football 2026, Kylian Mbappé, All Her Fault, Rudi Garcia, Romelu Lukaku, Coupe du monde de football, Sadio Mané, Didier Deschamps.

About WikiRank

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 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information