In molecular biology, the protein domain b1 refers to the domain b1 of Protein L. L is a bacterial protein with immunoglobulin (Ig) light chain-binding properties. It contains a number of homologous b1 repeats towards the N terminus. These repeats have been found to be responsible for the interaction of protein L with Ig light chains.[1] N-terminus domain contains five homologous B1 repeats of 72-76 amino acids each.[1]
| B1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 antibody-antigen complex | |||||||||
| Identifiers | |||||||||
| Symbol | B1 | ||||||||
| Pfam | PF02246 | ||||||||
| InterPro | IPR003147 | ||||||||
| SMART | PB1 | ||||||||
| SCOP2 | 1ipg / SCOPe / SUPFAM | ||||||||
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