Diversity of 3′ variable region of

摘要

Polymerase chain reaction (PCR) products of the cagA 3′ variable region. Lane 1, subtype ABBD; Lane 2, subtype ABBB; Lane 3, subtype AAABD; Lane 4, subtype ABBBD; Lane 5, subtype ABDABD; Lane 6, subtype AB′B′B′B′BD; Lane 7, subtype AB′B′B′B′B′BD; Lane 8, subtype AB′BB″DAB′; Lane 9, subtype ABD; Lane 10, subtype ABCC; Lane 11, subtype ABCCCC; Lane 12, subtype ABC; Lane 13, negative control; M: DL2000 DNA marker