TY - RPRT TI - Genomic evidence for two functionally distinct gene classes. AU - M C Rivera AU - R Jain AU - J E Moore AU - J A Lake PY - 1998 DO - 10.1073/pnas.95.11.6239 UR - https://pubmed.ncbi.nlm.nih.gov/9600949/ ID - 9600949 ER -