passages.id: split_6_test_1620_passage
passages.type: progene_text
passages.text: Using 5' rapid amplification of cDNA ends , RT - PCR and comparison with three Human Genome Project and three expressed sequence tag sequences , we have characterized the gene for apoL and for three additional , highly homologous proteins that constitute a new family of proteins that display no homology with previously described apolipoproteins .