ELISA plate was coated with serially diluted Rat IgG2b-UNLB (SB Cat. No. 0127-01). Immunoglobulin was detected with Mouse Anti-Rat IgG1-HRP (SB Cat. No. 3060-05), Mouse Anti-Rat IgG2a-HRP (SB Cat. No. 3065-05), Mouse Anti-Rat IgG2b-HRP (SB Cat. No. 3070-05), Mouse Anti-Rat IgG2c-HRP (SB Cat. No. 3075-05), and Goat Anti-Rat IgM-HRP (SB Cat. No. 3030-05) and quantified.