TY - RPRT TI - Functional constraints on replacing an essential gene with its ancient and modern homologs AU - Kacar, B. AU - Garmendia, E. AU - Tuncbag, N. AU - Andersson, D. I. AU - Hughes, D. PY - 2016 DO - 10.1101/087924 UR - https://www.biorxiv.org/content/10.1101/087924v1 ID - 10.1101/087924 ER -