Leifson
His letter states their origin as follows: a culture sent for identi-
fication was streaked for single colonies which were picked and numbered RL,R2, ote.

We reopived

RT 2/4 motile (=SW 576) derived from colony R7, (motile)

R7 3/5 paralysed (=SW 575) " " nooo 8

Rl2, paralyzed (¥S¥ 596) " " “R12 (naralsed)
7 RL, 2/4 " (=Se 587) - " : n RL "

Fu 59764 * (=8W 580) " " i" "

FM 60/62 motile (=SW 579) " " non

| FM 57/66 skawly motile, 90% w."curly" flagella (sw 577 *

( - Fu 61/63 paralysed (=SW 578) " put via FM 1/7,

a motile roversion; l.e. 578 represents an independent mutation to para-
lysis.

575 constitutes a 3rd occurrence of this mutation, but 586 and 587 could be part

of the same olone aa 380.

R20 1/2 ~" ( SW 573) derived from co.on R~20
R 20 1/4 "0" (SW 574) " " " "