Fall 09 - Name

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Name _______________________________________________________________________________ 1 CHEM 340.01: Biochemistry I Exam 1 September 23, 2009 Part IA and B: 1-12, 2 pts. Each; 13-17, 4 pts. Each Part II 18) (36 pts.) For Figure 1 above, write the one AND three letter abbreviations of the amino acids in the peptide. N- terminus C-terminus 1 Letter Y A Y N I N E R S 3 Letter Tyr Ala Tyr Asn Ile Asn Glu Arg Ser 19) (12 pts.) For Figure 2 , do the following: a) (5/10) M-E-R-C-Y b) (7/10) pI = 1 2 pK 1 + pK 2 ( ) Net charge a very low pH = +2 (terminal amine and arginine carry positive charges; everything else is neutral). 1 st proton to leave is terminal COOH proton (+1 net charge); next is side chain carboxylate COOH of Glu (0 net charge-this is pK 1 ); next is side chain SH of Cys (this is pK 2 ) pI = 1 2 4.25 + 8.18 ( ) = 6.22 No. Answer No. Answer 1 D 10 A 2 B 11 B 3 C 12 D 4 B 13 D 5 A 14 A 6 A 15 C 7 C 16 C 8 D 17 A 9 A Name _______________________________________________________________________________...
View Full Document

Page1 / 2

Fall 09 - Name

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online