31. In mice, the insulin-like growth factor 2 gene undergoes imprinting . 32. If the desired postage is no longer topped up, imprinting is denied. 33. See imprinting ( psychology ) for some related topics. 34. Factors such as nutrition during pregnancy can affect imprinting . 35. The former managers said imprinting brings customers in, who then buy more goods. 36. Thus, individuals with lower methylation states likely lost some of the imprinting effect. 37. These rubber imprinting tools are manufactured from molds created from authentic stone or wood. 38. Expression of these two isoforms only comes from the paternal allele due to imprinting . 39. Recently the 2009 stamp on Louis Braille had braille imprinting on it in addition. 40. Other causes include uniparental disomy, imprinting ; the biochemical mechanism is DNA methylation.