As a subfamily of Argonaute proteins, Piwi is poorly understood compared with Ago subfamily until recent discovery of Piwi protein interacting with piRNA. We did a large scale screening of insect genomes to identify piwi-like genes.Full or partial cDNA sequences were obtained by EST elongation and GENSCAN.IWI domain is of 300 aa in the C-terminal region and structurally similar to RNaseH catalytic domain, which performs a crucial role in slicer activity [6] , [7] and [8] . In animals, Argonaute protein family can be divided into two classes: Ago subfamily and Piwi subfamily.
The AFP recently examined the time an inmate spends on death row between sentencing and execution and questioned if inmates are being punished twice with long-term imprisonment and execution. They found an average inmate spends 13 years on death row, with some spending 30 years or more.he AFP recently examined the time an inmate spends on death row between sentencing and execution and questioned if inmates are being punished twice with long-term imprisonment and execution. They found an average inmate spends 13 years on death row, with some spending 30 years or more.
But $1,612 a year might be eliminated from the annual cost, assuming prisoners who could never be paroled are not enrolled in rehabilitation programs. However, at an annual cost of $137,102, a prisoner who sits on death row for 20 years could cost taxpayers a total of $2,742,040 in that time. Adding to the total cost of LWOP is that the California's prison population is aging. According to an Associated Press story published in July 2008, California housed 4,805 inmates 60 and older at the end of 2007, about 3 percent of all prisoners.