The chimera was engineered to keep a single copy of the mature α-factor peptide.
The dosage of X linked genes is not identical in males and females, and a single copy of genes on the X chromosome in females is kept transcriptionally active so as to achieve equal dosage.
Similarly, microfilm enables a single copy to satisfy many users and reduces the number of copies of the book that must be kept available in a library.
A €17 (about $19) pledge to the duo's Kickstarter will get you a single copy.
'Katahdin' containing a single copy of the RB gene.
Strikingly, while the echinoderm genome encodes a single copy of DIA1 and of DIA1L, the cephalochordate genome encodes a single copy of DIA1 and multiple copies of DIA1L.
Orthologs present in a single copy in any given genome were then selected using OrthoMCL (Li et al. 2003) and a custom script designed to keep only those matching with a single or no COG entry.
Never keep a single gerbil.
Fletcher kept a copy of the footage.
But Lipkin kept a copy of the manuscript.
