What is the net charge on the amino acid cysteine at pH 8.0? (pKa values are α-carboxyl 2; α-amino 10; side chain 8)

Macmillan Learning Consider the structure of methionine in its +1 charge state. H₂N CH₂ CH₂ CH3 -OH Give the pK, value for the a-amino group of methionine. An answer within ±0.5 units is acceptable. Give the pK, value for the a-carboxyl group of methionine. An answer within +0.5 units is acceptable. Determine the isoelectric point (pl) for methionine. Give your answer to two decimal places. pK (−NH ) = pK₂ (-COOH) = pl = 5.74 2.28 Incorrect 9.21 Incorrect Attempt

S-palmitoylation is an example of a lipid modification, where the fatty acid forms a thioester with a cysteine residue. What is the structure of an alkynyl S-palmitoylated protein?  (You can draw the main part of the protein as a blob)

Please Explain each part to the best of your ability. This is Biochemistry. Thank you