1). The oligonucleotides used contained the desired mutations for SCKASGYTFTNYGMNWVRQAPGQGLEWMGLQYAI FPYTFGQGTRLEIK selleckchem were 5′-GCG AAT AAG TTC TGG GGT ATT TCC TGC AAG GCT TCT GGT TAC ACC TTT ACC TAA ATA AAA TAT AAG ACA GGC-3′, 5′-GCT TCT GGT TAC ACC TTT ACC AAC TAT GGA ATG AAC TGG GTG CGA CAG GCC TAA ATA AAA TAT AAG ACA GGC-3′, 5′-ATG AAC TGG GTG CGA CAG GCC CCT GGA CAA GGG CTT GAG TGG ATG GGA CTA TAA ATA AAA TAT AAG ACA GGC-3′, 5′-GGG CTT GAG TGG ATG GGA CTA CAA TAT GCT ATT TTT CCG TAC ACG TTC GGC TAA ATA AAA TAT AAG ACA GGC-3′ and 5′-ATT TTT CCG TAC ACG TTC GGC CAA GGG ACA CGA CTG GAG ATT AAA TAA ATA AAA TAT AAG ACA

GGC-3′ (boldface triplets represent inserted sites). Plasmids containing inserted DNA sequences were transformed into competent TG1 E. coli, and cells were grown in FB medium containing 50 μg/ml ampicillin. The procedures of cultivating TG1 cells and purifying conjugated peptides were the same as that of preparing colicin Ia protein. In vitro killing activity, Immunolabeling and affinity assays ZR-75-30, MCF-7, and Raji cells were grown in the Falcon 3046

six-well cell culture plates (Becton Dickinson Co.) under the same condition as that of above described. 24 hours later, I-BET-762 in vivo 5–125 μg/ml PMN, wild type colicin Ia (wt Ia), parental antibody-colicin Ia fusion protein (Fab-Ia), single-chain antibody-colicin Ia fusion protein (Sc-Ia) (CL(Xi’an) Bio-scientific) and nonrelative control protein, low molecular weight marker protein (LWMP, purchased from Takara) were respectively added to the cell culture wells. After CFTRinh-172 co-incubating for 24 hours, the living and dead cells were stained

with 50 nM acridine orange and 600 nM propidium iodide and staining was imaged using a digital data collection system under an inverted fluorescent microscope (IX-71, Olympus) using Methocarbamol U-MWU2, U-MNB2 and U-MNG2 filters. For the comparison of killing competency presented by those agents with each other, we selected five image fields to respectively count the number of dead and living cells in every culture well after 24, 48 and 72 hours. MCF-7 cell were grown in 1640 medium for 72 h, fixed in 10% paraformaldehyde for 40 min at room temperature, then 100 μl fixed cells (106/ml) were incubated with 10 μl PBS, LWMP, Fab, Sc (CL(Xi’an) Bio-Scientific) and PMN respectively with different concentration (102-10-1nM) for 1 hr at 37°C, then incubated with parental antibody for 40 min at 37°C and fluorescein isothiocyanate (FITC) -labeled second antibody (Pierce) for 30 min at 37°C.