On day 49, the blood was collected from the heart bleeding and centrifuged at 5,000g, and the serum was collected, mixed with 20 folds in volume of KLH solution to
preabsorb antiKLH in the antiserum.
For the detection of actin, the membrane was blocked with 1% BSA for 30 minutes at room temperature and probed with the primary antibody for actin (sc-1616, Santa Cruz Biotechnology) (diluted at 1: 500) for overnight at 4[degrees]C and was thereafter incubated with anti-goat IgG, HRP
preabsorbed from donkey (ab97120) (1: 5000) for 1 hour at room temperature.
The test was performed as follows: sections of the stomach were incubated with a "working" dilution of the primary immunoserum, which had been previously
preabsorbed for 18 h at 37[degrees]C with 20 [micro]g of appropriate purified protein SP (ab120170, Abcam), CGRP (ab158017, Abcam), and L-ENK (ab159087, Abcam).
Then 100 [micro]L/well of
preabsorbed serum sample at a 1: 100 dilution in diluting buffer (PBST) was then added and incubated at room temperature for two hours, followed by an additional washing step.
Positive controls for labeling specificity of each peptide were performed by incubating sections with antiserum
preabsorbed with the respective antigen (10-100 g/ml).
(12,18,20) Briefly, each threshold optical density was determined by normalizing the data to those of the (
preabsorbed negative) control sections.
aeruginosa was
preabsorbed at 4[degrees]C overnight, with increasing concentrations of MC(-) lysate (solution phase).
The IgG fraction
preabsorbed with the antigen peptide was processed as described above.