cdc2-related protein kinase isolated from Trypanosoma cruzi; binds cyclins; tzcrk1 encodes a 33 kDa protein sharing 52.7% identity with human cdc2 and a high degree of identity (> 78%) with T. brucei CRK1, Leishmania mexicana CRK1 and Trypanosoma congolense CRK1; amino acid sequence in first source; GenBank U74762