Is there Kozak sequence present in the Human ORFeome clones?
In the reference paper for the collection it states: "The 5' Gateway primer also incorporates a Kozak consensus nucleotide, G, at -3 relative to the ATG, thereby allowing efficient translational initiation from the ATG initiation codon."
Rual JR et al (2004). Human ORFeome Version 1.1: a platform for reverse proteomics. Genome Research 14, 21282135. http://www.genome.org/cgi/content/full/14/10b/2128.