BMC Genomics 2008, 9:122 http://www.biomedcentral.com/1471-2164/9/122 LFeignugtrhed3istribution of human tORFs, broken down by frame Length distribution of human tORFs, broken down by frame. A) redundant methionine-start translated ORFs (tORFM) and B) non-redundant tORFs beginning with any amino acid (tORFX). White bars correspond to frame +1 tORFs, grey bars correspond to frame -1. C) Frequencies of methionine and stop codons in frames +1 and -1. Page 5 of 16 (page number not for citation purposes)