Does the mouse C4-binding protein gene (C4BP) map in the H-2 region?

Area of Science:

• Immunogenetics
• Mouse genetics

Background:

• A prior study suggested genetic polymorphism in mouse C4-binding protein (C4-bp).
• This reported polymorphism was used to map the C4BP locus to the mouse H-2D-Qa interval.
• The genetic basis and precise location of the C4BP gene in mice were thus subjects of prior investigation.

Purpose of the Study:

• To re-evaluate the reported genetic polymorphism of mouse C4-binding protein (C4-bp).
• To clarify the mapping position of the C4BP locus within the mouse H-2 system.

Main Methods:

• Purification of mouse C4-binding protein (C4-bp).
• Analysis of purified C4-bp for the presence of genetic variants.

Main Results:

• Purified C4-binding protein (C4-bp) did not exhibit the genetic polymorphism previously reported.
• The existence of distinct genetic variants of C4-bp in mice was not confirmed by this study.

Conclusions:

• The previously proposed genetic polymorphism of mouse C4-binding protein (C4-bp) is not supported by current findings.
• The mapping position of the C4BP locus in the mouse genome remains undetermined due to the lack of confirmed polymorphism.