Figure 2

Principal Component Analysis of chromosome 9 bands separating the "s" and "b" group. The second principal component separates almost all patients of the subgroup "b" from the remain. They are grouped together close to the first four vectors, corresponding to the first four bands 9p24, 9p23, 9p22, 9p21, which go into the same direction and are of similar length. Remarkable are the vectors of the bands 9q33 and 9q34. They also are of similar length and go exactly into the same direction. Along their length, they congregate almost all patients of the type "s". This leads to the assumption, that the first four and the last two bands of chromosome 9 play a crucial role for "s" and "b" classification.