Which of the Following Is Not a Characteristic of Native

Multiple Choice

Which of the following is not a characteristic of native antigen recognized by T cells?

A) peptides ranging between 8 and 25 amino acids in length
B) not requiring degradation for recognition
C) amino acid sequences not found in host proteins
D) primary,and not secondary,structure of protein
E) binding to major histocompatibility complex molecules on the surface of antigen-presenting cells.