Patent ID: 7354991

Claim:
An isolated peptide which binds to a body fluid sample obtained from a schizophrenic patient at a higher level than its binding to a body fluid sample obtained from a non-schizophrenic individual, said peptide being no more than 10 amino acids (a.a.) long and comprising one of the sequences selected from the group consisting of: i. LVVGLCK, (SEQ ID NO. 1) ii. KLVVGLC, (SEQ ID NO. 2) iii. LVVGLMK, and (SEQ ID NO. 3) iv. KLVVGLM; (SEQ ID NO. 4) said sequence consisting of at least one positively charged a.a. at one end of said sequence; and wherein said peptide optionally comprises at least one additional positively charged a.a. at its end.