Amino Acid Sequence|Amino Acids|Animals|Antibody Specificity|Autoantibodies|Complementarity Determining Regions|Databases, Factual|Immunoglobulin Heavy Chains|Immunoglobulin Variable Region|Mice|Molecular Sequence Data|Nucleotides|Rheumatoid Factor|Sequence Alignment|Sequence Analysis, DNA|Sequence Analysis, Protein