Mouse Immunglobulin Allotypes?

[scostant at cc.curtin.edu.au]

I am working with the following strains of mice; AKR, C57Bl/6J, CBA/H and BALB/c
I would like to know what the immunoglobulin gene allotypes are for these 
strains. ie. allotypes for gammaG1, gammaG2a, and gammaG2b?  The names of 
relavent journals would be appreciated. I have only been able to find the 
gamma2a allotype for the BALB/c mice but am looking for the others.

Thanks in advance,
Paul Costantino (Ph D student)
Curtin University of Technology
Perth, Western Austarlia

email (scostant at cc.curtin.edu.au)