TY - RPRT TI - Hypervariability generated by natural selection in an extracellular complement-inhibiting protein of serotype M1 strains of group A Streptococcus. AU - K E Stockbauer AU - D Grigsby AU - X Pan AU - Y X Fu AU - L M Mejia AU - A Cravioto AU - J M Musser PY - 1998 DO - 10.1073/pnas.95.6.3128 UR - https://pubmed.ncbi.nlm.nih.gov/9501227/ ID - 9501227 ER -