Positive test controls include: Rat lung. Immunogen sequence: KAENPEQQLK QEKTQRDQQL NKQLEEEKKL LDQQLDQELV KRDEQLGMKK EQLLELPEQQ EGHLKHLEQQ EGQLKHPEQQ EGQLELPEQQ EGQLELPEQQ E. Involucrin, a component of the keratinocyte crosslinked envelope, is found in t