Src is an important signaling protein that is regulated by phosphorylation. A purified solution of Src is digested with proteases into peptides, and the peptide mixture is then incubated with extracts from lymphoma cells known to have tyrosine kinase activity. The peptides are analyzed by mass spec to identify any Src peptides that are phosphorylated. Src peptide fragment Asn-Gln-Tyr-Thr is identified Draw basic stick figures showing the ionization states of peptide Asn-Gln-Tyr- Thr as the pH is raised from acidic to basic. Indicate the pKa values of the different ionizable groups on your figure.

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative