| Label | Id | |
|---|---|---|
| class A | protein | |
| class B1 | protein | |
| class B2 | protein | |
| classes 1 and 2 | protein | |
| classes namely proteins | protein | |
| class I and II proteins | protein | |
| class I antigens | protein | |
| classified proteins | protein | |
| class II antigens | protein | |
| class II human leukocyte antigen | protein | |
| Class III | protein | |
| class III protein | protein | |
| Class I | protein | |
| CLC | protein | |
| CLD | protein |