Molecular characterization of human complement factor I in two brazilian families - Delcolli, Maria Isabel Mesquita Vendramini; Rodrigues, Vitor Hugo; Silva, Caroline; Reis, Edimara; Florido, Marlene; Nudelman, Victor; Leitão, Monica; Condino Neto, Antonio; Isaac, Lourdes (Congress of the Brazilian Society for Immunology - SBI, 2008)