TY - RPRT TI - A minimal avian retroviral packaging sequence has a complex structure. AU - J D Banks AU - A Yeo AU - K Green AU - F Cepeda AU - M L Linial PY - 1998 DO - 10.1128/jvi.72.7.6190-6194.1998 UR - https://pubmed.ncbi.nlm.nih.gov/9621088/ ID - 9621088 ER -