We then sampled each solution, transferred the sample into a clean vial, and allowed the vial uncovered for 5 min to vaporize the solvent before adding the CMU sample, which was mixed equally from 9 castrated donors into the vial, as desired scented CMU.
Before adding the peptide samples to plates for matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI ToF MS), the α-cyano-4-hydroxycinnamic acid (4-HCCA) matrix was made saturated in 50%ACN/0.11% TFA, diluted 1 2, spotted onto plates, and dried.
Before adding the QuEChERS salt, the sample was soaked into the extraction solvent (1% HAc) so as to allow the solvent to swollen the cell wall of the plant material and facilitate the release of analytes from the matrix into the solution.
Before adding the ninhydrin reagent, samples were reduced by incubation with 10 mM dithioerythritol in 10 mM Tris HCl buffer at pH 8.5 for 10 min.
When the burst sizes of L-413C and P2 vir1 were determined, CaCl2 was added to the bacterial culture up to 5 mM before adding the phage and samples for PFU counting were taken every 15 min. The experiment with P2 vir1 was performed at 37°C.
Two petri dishes were filled before adding the slurry to the water samples, two in the middle of the preparation sequence and two at the very end.
Seeds, 4 μl of a 10%% brain homogenate, were sonicated for 15 min in in a TK-52 water bath sonifier (Bandelin) before adding to the samples.
Equal volumes of eluted Flag-Cry1 were combined with the indicated amounts of recombinant Hausp (cat #E-519; USP7, Boston Biochem) or USP8 (cat #E-520; Boston Biochem, Cambridge, MA) and the reactions were incubated for 30 min at 30°C before adding SDS sample buffer and boiling for 5 min. The resulting samples were separated by 8% SDS-PAGE and Cry1 was detected by immunoblot.
For liquid samples remove a protein aliquot (typically 10 20 μl) before adding methanol to the sample.
Proteins enriched in SILAC affinity pull-downs were reduced and alkylated, on bead, in 2 mM DTT and 10 mM iodoacetamide respectively before adding sample buffer and heating at 70°C for 10 minutes.
