Table 1.

Chlamydomonas strains used in this study

Mutant	Structural/motility defect
A54-e18	No axonemal structural defect/wild-type motility (19)
137c	No axonemal structural defect/wild-type motility (20)
oda1, pf28	Lack outer dynein arms/flagella beat with one-half frequency (21, 22)
ida1	Lacks inner dynein arm subform I1/reduced beat frequency, altered waveform (23)
pf6	Central apparatus, lacks 1a projection/flagella paralyzed or twitch (8, 24)
cpc1	Central apparatus, lacks 1b projection/reduced beat frequency (10)
pf14	Lacks radial spokes/paralyzed flagella (25)
pf17	Lacks radial spoke heads/paralyzed flagella (26)

References are indicated in parentheses.