S U B J E C T I N D E X
773
Plasma (clot)—continued
as substrate for cell movement, 3 5 - 6 ,
152, 183, 185, 196
Pleuropneumonia-like organisms ( P P L O )
as contaminant o f cell lines, 284
suppression b y kanamycin, 284
Ploidy,
during cell cycle, 221, 434
in cell strains, 125
D N A and, 318
mosaic, 412
tetra-, after inhibited divisions, 213,226
Pluronic F68, 126
Polarization (polarity),
of cells altered b y glass surface, 33
effect o f oriented substrate on, 187
o f endothelial and mesothelial cells, 165
of epithelial cells, 162, 184
intrinsic to cell, 187
of lymphocytes, 182, 184
of mechanocytes, 162, 184
o f sarcoma cells, 187
of Schwann cells, 184
Polarizing microscope,
and hanging-drop cultures, 33
and mitotic spindle, 211
Poliomyelitis, 5, 12, 505
Polyelectrolytes,
muco-substances as, 355, 364
Polyembryony, 561
Polymerase, 320, 325, 501
Polymorphs,
chemotaxis of, 185-6
and concentration gradients, 185
and contact inhibition, 190
pseudopodia of, 179
speed o f movement of, 182
Polyoma virus,
and transformation o f cells, 268
Polypeptides,
A T P and synthesis of, 241
and spreading o f cells, 32, 63
Polyploidy (see also Ploidy), 411-12, 423
Polysaccharides,
and cell-binding, 57
as prosthetic groups, 355
as sources o f carbohydrate, 246
sulphation of, 26
Polythene,
toxicity of, 32
Polyvinylpyrrolidone,
and cell aggregation, 500
in suspension cultures, 23, 126
Populations o f cells,
composition of, and cell aggregation,
501
density of, 69, 2 8 3 - 6
mitotic rate in, 421
requirements dependent on, 2 8 6 - 7 ,
501
Potassium,
essential requirement, 2 5 - 6
and growth rate, 111
and Naegleria, 166
to sodium ratio, 26, 167
tellurite, 567
Potentialities,
of external marginal zone, 5 3 4 - 6
of internal marginal zone, 5 3 7 - 9
Precancerous changes,
oestrone and, 630
Preprophase,
definition of, 224
D N A in, 322
and G 2 period, 221
Primary ectoblast, 533
Primary surface (of animal), 161
Primitive node, 557
incorporation o f glycine by, 570
Primitive streak, 5 5 4 - 5
energy sources for, 566
localization in, 557
as organizer, 556
orientation of, 556
stage in mammalian ova, 578
Proflavine,
toxicity of, 13
Progesterone,
and alkaline phosphatase, 627
and ionic balance, 167
and m a m m a r y gland, 127, 6 3 3 - 9
and N a / K , 26
and uterus, 632
and vagina, 625, 627
Progestine,
and heart fibroblasts, 616
Prolactin (see also M a m m o t r o p h i n ) ,
and m a m m a r y gland, 6 3 5 - 8
Proliferation (see Cell division),
and differentiation, 467
media for, 120
Proline,
and formation o f collagen, 305, 689
from glutamine, 283
773
Plasma (clot)—continued
as substrate for cell movement, 3 5 - 6 ,
152, 183, 185, 196
Pleuropneumonia-like organisms ( P P L O )
as contaminant o f cell lines, 284
suppression b y kanamycin, 284
Ploidy,
during cell cycle, 221, 434
in cell strains, 125
D N A and, 318
mosaic, 412
tetra-, after inhibited divisions, 213,226
Pluronic F68, 126
Polarization (polarity),
of cells altered b y glass surface, 33
effect o f oriented substrate on, 187
o f endothelial and mesothelial cells, 165
of epithelial cells, 162, 184
intrinsic to cell, 187
of lymphocytes, 182, 184
of mechanocytes, 162, 184
o f sarcoma cells, 187
of Schwann cells, 184
Polarizing microscope,
and hanging-drop cultures, 33
and mitotic spindle, 211
Poliomyelitis, 5, 12, 505
Polyelectrolytes,
muco-substances as, 355, 364
Polyembryony, 561
Polymerase, 320, 325, 501
Polymorphs,
chemotaxis of, 185-6
and concentration gradients, 185
and contact inhibition, 190
pseudopodia of, 179
speed o f movement of, 182
Polyoma virus,
and transformation o f cells, 268
Polypeptides,
A T P and synthesis of, 241
and spreading o f cells, 32, 63
Polyploidy (see also Ploidy), 411-12, 423
Polysaccharides,
and cell-binding, 57
as prosthetic groups, 355
as sources o f carbohydrate, 246
sulphation of, 26
Polythene,
toxicity of, 32
Polyvinylpyrrolidone,
and cell aggregation, 500
in suspension cultures, 23, 126
Populations o f cells,
composition of, and cell aggregation,
501
density of, 69, 2 8 3 - 6
mitotic rate in, 421
requirements dependent on, 2 8 6 - 7 ,
501
Potassium,
essential requirement, 2 5 - 6
and growth rate, 111
and Naegleria, 166
to sodium ratio, 26, 167
tellurite, 567
Potentialities,
of external marginal zone, 5 3 4 - 6
of internal marginal zone, 5 3 7 - 9
Precancerous changes,
oestrone and, 630
Preprophase,
definition of, 224
D N A in, 322
and G 2 period, 221
Primary ectoblast, 533
Primary surface (of animal), 161
Primitive node, 557
incorporation o f glycine by, 570
Primitive streak, 5 5 4 - 5
energy sources for, 566
localization in, 557
as organizer, 556
orientation of, 556
stage in mammalian ova, 578
Proflavine,
toxicity of, 13
Progesterone,
and alkaline phosphatase, 627
and ionic balance, 167
and m a m m a r y gland, 127, 6 3 3 - 9
and N a / K , 26
and uterus, 632
and vagina, 625, 627
Progestine,
and heart fibroblasts, 616
Prolactin (see also M a m m o t r o p h i n ) ,
and m a m m a r y gland, 6 3 5 - 8
Proliferation (see Cell division),
and differentiation, 467
media for, 120
Proline,
and formation o f collagen, 305, 689
from glutamine, 283